diff --git a/backend/mustek_usb2_asic.c b/backend/mustek_usb2_asic.c
index 6b2e282dc..147ae52c1 100644
--- a/backend/mustek_usb2_asic.c
+++ b/backend/mustek_usb2_asic.c
@@ -1593,7 +1593,7 @@ LLFMotorMove (PAsic chip, LLF_MOTORMOVE * LLF_MotorMove)
 
   DBG (DBG_ASIC, "LLFMotorMove: Enter\n");
 
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   status = Asic_WaitUnitReady (chip);
 
@@ -1699,8 +1699,7 @@ LLFMotorMove (PAsic chip, LLF_MOTORMOVE * LLF_MotorMove)
 	temp_motor_action | UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE;
     }
 
-  Mustek_SendData (chip, ES01_F3_ActionOption, SCAN_DISABLE |
-		   SCAN_BACK_TRACKING_DISABLE | temp_motor_action);
+  Mustek_SendData (chip, ES01_F3_ActionOption, temp_motor_action);
   Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_ENABLE);
 
   if (LLF_MotorMove->WaitOrNoWait == 1)
@@ -1777,7 +1776,7 @@ SetMotorStepTable (PAsic chip, LLF_MOTORMOVE * MotorStepsTable,
 	(wStartY - wScanAccSteps) : 0;
       wForwardSteps = 0;
 
-      chip->isMotorGoToFirstLine = MOTOR_MOVE_TO_FIRST_LINE_DISABLE;
+      chip->isMotorGoToFirstLine = 0;
     }
   else
     {
@@ -2053,7 +2052,7 @@ MotorBackHome (PAsic chip, SANE_Byte WaitOrNoWait)
   LLF_SetMotorTable.MotorTablePtr = BackHomeMotorTable;
   LLFSetMotorTable (chip, &LLF_SetMotorTable);
 
-  MotorMove.MotorSelect = MOTOR_0_ENABLE | MOTOR_1_DISABLE;
+  MotorMove.MotorSelect = MOTOR_0_ENABLE;
   MotorMove.MotorMoveUnit = TABLE_DEFINE_ES03;
   MotorMove.MotorSpeedUnit = SPEED_UNIT_1_PIXEL_TIME;
   MotorMove.MotorSyncUnit = MOTOR_SYNC_UNIT_1_PIXEL_TIME;
@@ -2250,9 +2249,8 @@ SafeInitialChip (PAsic chip)
   DBG (DBG_ASIC, "SafeInitialChip: Enter\n");
 
   Mustek_SendData (chip, ES01_F3_ActionOption, 0);
-  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle,
-		   CLOSE_ALL_CLOCK_DISABLE);
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle, 0);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   status = Asic_WaitUnitReady (chip);
 
@@ -2699,17 +2697,10 @@ SetAFEGainOffset (PAsic chip)
   LLFSetRamAddress (chip, 0x0, PackAreaStartAddress - (512 * 8 - 1),
 		    ACCESS_DRAM);
 
-  Mustek_SendData (chip, ES01_F3_ActionOption,
-		   MOTOR_MOVE_TO_FIRST_LINE_DISABLE |
-		   MOTOR_BACK_HOME_AFTER_SCAN_DISABLE |
-		   SCAN_ENABLE |
-		   SCAN_BACK_TRACKING_DISABLE |
-		   INVERT_MOTOR_DIRECTION_DISABLE |
-		   UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE |
-		   STATIC_SCAN_DISABLE_ES01 | MOTOR_TEST_LOOP_DISABLE);
+  Mustek_SendData (chip, ES01_F3_ActionOption, SCAN_ENABLE |
+		   UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE);
 
-  Mustek_SendData (chip, ES01_9A_AFEControl,
-		   AD9826_AFE | AUTO_CHANGE_AFE_GAIN_OFFSET_DISABLE);
+  Mustek_SendData (chip, ES01_9A_AFEControl, AD9826_AFE);
 
   Mustek_SendData (chip, ES01_00_ADAFEConfiguration, 0x70);
   Mustek_SendData (chip, ES01_02_ADAFEMuxConfig, 0x80);
@@ -3165,8 +3156,7 @@ Asic_Open (PAsic chip)
     }
 
   Mustek_SendData (chip, ES01_94_PowerSaveControl, 0x27);
-  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle,
-		   CLOSE_ALL_CLOCK_DISABLE);
+  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle, 0);
   Mustek_SendData (chip, ES01_79_AFEMCLK_SDRAMCLK_DELAY_CONTROL,
 		   SDRAMCLK_DELAY_12_ns);
 
@@ -3245,7 +3235,7 @@ Asic_TurnLamp (PAsic chip, SANE_Bool isLampOn)
     }
 
   if (chip->firmwarestate > FS_OPENED)
-    Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+    Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   if (isLampOn)
     PWM = LAMP0_PWM_DEFAULT;
@@ -3276,7 +3266,7 @@ Asic_TurnTA (PAsic chip, SANE_Bool isTAOn)
     }
 
   if (chip->firmwarestate > FS_OPENED)
-    Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+    Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   if (isTAOn)
     PWM = LAMP1_PWM_DEFAULT;
@@ -3321,7 +3311,7 @@ Asic_WaitUnitReady (PAsic chip)
   while (((temp_status & 0x1f) != 0) && i < 300);
   DBG (DBG_ASIC, "Waited %d s\n", (unsigned short) (i * 0.1));
 
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   DBG (DBG_ASIC, "Asic_WaitUnitReady: Exit\n");
   return status;
@@ -3344,7 +3334,7 @@ Asic_Initialize (PAsic chip)
   Asic_Reset (chip);
   InitTiming (chip);
 
-  chip->isUniformSpeedToScan = UNIFORM_MOTOR_AND_SCAN_SPEED_DISABLE;
+  chip->isUniformSpeedToScan = 0;
   chip->isMotorGoToFirstLine = MOTOR_MOVE_TO_FIRST_LINE_ENABLE;
 
   chip->UsbHost = HT_USB10;
@@ -3406,9 +3396,8 @@ Asic_SetWindow (PAsic chip, SANE_Byte bScanBits,
     }
 
   Mustek_SendData (chip, ES01_F3_ActionOption, 0);
-  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle,
-		   CLOSE_ALL_CLOCK_DISABLE);
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle, 0);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   status = Asic_WaitUnitReady (chip);
 
@@ -3561,16 +3550,13 @@ Asic_SetWindow (PAsic chip, SANE_Byte bScanBits,
 
   /* SetADConverter */
   Mustek_SendData (chip, ES01_74_HARDWARE_SETTING,
-		   MOTOR1_SERIAL_INTERFACE_G10_8_ENABLE | LED_OUT_G11_DISABLE
-		   | SLAVE_SERIAL_INTERFACE_G15_14_DISABLE |
-		   SHUTTLE_CCD_DISABLE);
+		   MOTOR1_SERIAL_INTERFACE_G10_8_ENABLE);
 
   /* set AFE */
-  Mustek_SendData (chip, ES01_9A_AFEControl,
-		   AD9826_AFE | AUTO_CHANGE_AFE_GAIN_OFFSET_DISABLE);
+  Mustek_SendData (chip, ES01_9A_AFEControl, AD9826_AFE);
   SetAFEGainOffset (chip);
 
-  Mustek_SendData (chip, ES01_F7_DigitalControl, DIGITAL_REDUCE_DISABLE);
+  Mustek_SendData (chip, ES01_F7_DigitalControl, 0);
 
   /* calculate X ratio */
   XRatioTypeDouble = wXResolution;
@@ -3588,7 +3574,6 @@ Asic_SetWindow (PAsic chip, SANE_Byte bScanBits,
 
   /* SetMotorType */
   Mustek_SendData (chip, ES01_A6_MotorOption, MOTOR_0_ENABLE |
-		   MOTOR_1_DISABLE |
 		   HOME_SENSOR_0_ENABLE | TABLE_DEFINE_ES03);
 
   Mustek_SendData (chip, ES01_F6_MotorControl1, SPEED_UNIT_1_PIXEL_TIME |
@@ -3661,17 +3646,12 @@ Asic_SetWindow (PAsic chip, SANE_Byte bScanBits,
     {
       Asic_MotorMove (chip, 1, wY / wMultiMotorStep);
       isUniformSpeedToScan = UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE;
-      isScanBackTracking = SCAN_BACK_TRACKING_DISABLE;
-      isMotorMoveToFirstLine = MOTOR_MOVE_TO_FIRST_LINE_DISABLE;
+      isScanBackTracking = 0;
+      isMotorMoveToFirstLine = 0;
     }
 
   Mustek_SendData (chip, ES01_F3_ActionOption, isMotorMoveToFirstLine |
-		   MOTOR_BACK_HOME_AFTER_SCAN_DISABLE |
-		   SCAN_ENABLE |
-		   isScanBackTracking |
-		   INVERT_MOTOR_DIRECTION_DISABLE |
-		   isUniformSpeedToScan |
-		   STATIC_SCAN_DISABLE_ES01 | MOTOR_TEST_LOOP_DISABLE);
+		   SCAN_ENABLE | isScanBackTracking | isUniformSpeedToScan);
 
   if (EndSpeed > 8000)
     {
@@ -3909,9 +3889,8 @@ Asic_ScanStop (PAsic chip)
     }
 
   Mustek_SendData (chip, ES01_F3_ActionOption, 0);
-  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle,
-		   CLOSE_ALL_CLOCK_DISABLE);
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle, 0);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
   Mustek_ClearFIFO (chip);
 
   chip->firmwarestate = FS_OPENED;
@@ -4090,7 +4069,7 @@ Asic_SetMotorType (PAsic chip, SANE_Bool isMotorMove)
   if (isMotorMove)
     chip->isMotorMove = MOTOR_0_ENABLE;
   else
-    chip->isMotorMove = MOTOR_0_DISABLE;
+    chip->isMotorMove = 0;
 
   DBG (DBG_ASIC, "isMotorMove=%d\n", chip->isMotorMove);
   DBG (DBG_ASIC, "Asic_SetMotorType: Exit\n");
@@ -4134,7 +4113,7 @@ Asic_MotorMove (PAsic chip, SANE_Bool isForward, unsigned int dwTotalSteps)
 
   free (NormalMoveMotorTable);
 
-  MotorMove.MotorSelect = MOTOR_0_ENABLE | MOTOR_1_DISABLE;
+  MotorMove.MotorSelect = MOTOR_0_ENABLE;
   MotorMove.MotorMoveUnit = TABLE_DEFINE_ES03;
   MotorMove.MotorSpeedUnit = SPEED_UNIT_1_PIXEL_TIME;
   MotorMove.MotorSyncUnit = MOTOR_SYNC_UNIT_1_PIXEL_TIME;
@@ -4197,7 +4176,7 @@ Asic_SetShadingTable (PAsic chip, unsigned short * lpWhiteShading,
   if (chip->firmwarestate < FS_OPENED)
     OpenScanChip (chip);
   if (chip->firmwarestate == FS_SCANNING)
-    Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+    Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
 
   if (wXResolution > 600)
@@ -4304,7 +4283,7 @@ Asic_WaitCarriageHome (PAsic chip)
     status = STATUS_DEVICE_BUSY;
   DBG (DBG_ASIC, "Waited %d s\n", (unsigned short) (i * 0.3));
 
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
   chip->firmwarestate = FS_OPENED;
 
   DBG (DBG_ASIC, "Asic_WaitCarriageHome: Exit\n");
@@ -4342,9 +4321,9 @@ Asic_SetCalibrate (PAsic chip, SANE_Byte bScanBits, unsigned short wXResolution,
   unsigned short BackTrackFixSpeedStep = 20;
   unsigned short wMultiMotorStep = 1;
   SANE_Byte bMotorMoveType = _4_TABLE_SPACE_FOR_FULL_STEP;
-  SANE_Byte isMotorMoveToFirstLine = MOTOR_MOVE_TO_FIRST_LINE_DISABLE;
+  SANE_Byte isMotorMoveToFirstLine = 0;
   SANE_Byte isUniformSpeedToScan = UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE;
-  SANE_Byte isScanBackTracking = SCAN_BACK_TRACKING_DISABLE;
+  SANE_Byte isScanBackTracking = 0;
   unsigned int TotalStep = 0;
   unsigned short StartSpeed, EndSpeed;
   LLF_CALCULATEMOTORTABLE CalMotorTable;
@@ -4376,9 +4355,8 @@ Asic_SetCalibrate (PAsic chip, SANE_Byte bScanBits, unsigned short wXResolution,
     }
 
   Mustek_SendData (chip, ES01_F3_ActionOption, 0);
-  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle,
-		   CLOSE_ALL_CLOCK_DISABLE);
-  Mustek_SendData (chip, ES01_F4_ActiveTrigger, ACTION_TRIGGER_DISABLE);
+  Mustek_SendData (chip, ES01_86_DisableAllClockWhenIdle, 0);
+  Mustek_SendData (chip, ES01_F4_ActiveTrigger, 0);
 
   status = Asic_WaitUnitReady (chip);
 
@@ -4493,14 +4471,11 @@ Asic_SetCalibrate (PAsic chip, SANE_Byte bScanBits, unsigned short wXResolution,
 
   /* SetADConverter */
   Mustek_SendData (chip, ES01_74_HARDWARE_SETTING,
-		   MOTOR1_SERIAL_INTERFACE_G10_8_ENABLE | LED_OUT_G11_DISABLE
-		   | SLAVE_SERIAL_INTERFACE_G15_14_DISABLE |
-		   SHUTTLE_CCD_DISABLE);
+		   MOTOR1_SERIAL_INTERFACE_G10_8_ENABLE);
 
   /* set AFE */
-  Mustek_SendData (chip, ES01_9A_AFEControl,
-		   AD9826_AFE | AUTO_CHANGE_AFE_GAIN_OFFSET_DISABLE);
-  Mustek_SendData (chip, ES01_F7_DigitalControl, DIGITAL_REDUCE_DISABLE);
+  Mustek_SendData (chip, ES01_9A_AFEControl, AD9826_AFE);
+  Mustek_SendData (chip, ES01_F7_DigitalControl, 0);
 
   XRatioTypeDouble = wXResolution;
   XRatioTypeDouble /= wThinkCCDResolution;
@@ -4518,18 +4493,8 @@ Asic_SetCalibrate (PAsic chip, SANE_Byte bScanBits, unsigned short wXResolution,
        "XRatioTypeDouble=%.2f,XRatioAdderDouble=%.2f,XRatioTypeWord=%d\n",
        XRatioTypeDouble, XRatioAdderDouble, XRatioTypeWord);
 
-  if (chip->isMotorMove == MOTOR_0_ENABLE)
-    {
-      Mustek_SendData (chip, ES01_A6_MotorOption, MOTOR_0_ENABLE |
-		       MOTOR_1_DISABLE |
-		       HOME_SENSOR_0_ENABLE | TABLE_DEFINE_ES03);
-    }
-  else
-    {
-      Mustek_SendData (chip, ES01_A6_MotorOption, MOTOR_0_DISABLE |
-		       MOTOR_1_DISABLE |
-		       HOME_SENSOR_0_ENABLE | TABLE_DEFINE_ES03);
-    }
+  Mustek_SendData (chip, ES01_A6_MotorOption, chip->isMotorMove |
+		   HOME_SENSOR_0_ENABLE | TABLE_DEFINE_ES03);
   DBG (DBG_ASIC, "isMotorMove=%d\n", chip->isMotorMove);
 
   Mustek_SendData (chip, ES01_F6_MotorControl1, SPEED_UNIT_1_PIXEL_TIME |
@@ -4609,12 +4574,7 @@ Asic_SetCalibrate (PAsic chip, SANE_Byte bScanBits, unsigned short wXResolution,
 
 
   Mustek_SendData (chip, ES01_F3_ActionOption, isMotorMoveToFirstLine |
-		   MOTOR_BACK_HOME_AFTER_SCAN_DISABLE |
-		   SCAN_ENABLE |
-		   isScanBackTracking |
-		   INVERT_MOTOR_DIRECTION_DISABLE |
-		   isUniformSpeedToScan |
-		   STATIC_SCAN_DISABLE_ES01 | MOTOR_TEST_LOOP_DISABLE);
+		   SCAN_ENABLE | isScanBackTracking | isUniformSpeedToScan);
 
   if (chip->lsLightSource == LS_REFLECTIVE)
     Mustek_SendData (chip, ES01_F8_WHITE_SHADING_DATA_FORMAT,
diff --git a/backend/mustek_usb2_asic.h b/backend/mustek_usb2_asic.h
index e2dbb65af..67fa6cbeb 100644
--- a/backend/mustek_usb2_asic.h
+++ b/backend/mustek_usb2_asic.h
@@ -282,7 +282,6 @@ typedef enum
 #define		ES02_50_MOTOR_CURRENT_CONTORL		0x50
 		/* bit[0] */
 #define	DOWN_LOAD_MOTOR_TABLE_ENABLE				0x01
-#define	DOWN_LOAD_MOTOR_TABLE_DISABLE				0x00
 		/* bit[3:1] */
 #define	_4_TABLE_SPACE_FOR_FULL_STEP				0x00
 #define	_8_TABLE_SPACE_FOR_1_DIV_2_STEP				0x02
@@ -290,10 +289,8 @@ typedef enum
 #define	_32_TABLE_SPACE_FOR_1_DIV_8_STEP			0x0E
 		/* bit[4] */
 #define	MOTOR_TABLE_ADDR_SHOW_IN_FIRST_PIXEL_OF_LINE_ENABLE	0x10
-#define	MOTOR_TABLE_ADDR_SHOW_IN_FIRST_PIXEL_OF_LINE_DISABLE	0x00
 		/* bit[5] */
 #define	MOTOR_CURRENT_TABLE_ADDRESS_BIT4_TO_BIT0_ENABLE		0x20
-#define	MOTOR_CURRENT_TABLE_ADDRESS_BIT4_TO_BIT0_DISABLE	0x00
 
 #define		ES02_51_MOTOR_PHASE_TABLE_1		0x51
 #define		ES02_52_MOTOR_CURRENT_TABLE_A		0x52
@@ -314,21 +311,12 @@ typedef enum
 #define		ES01_65_AFE_AUTO_GAIN_OFFSET_BLUE_HB	0x65
 
 #define		ES01_74_HARDWARE_SETTING		0x74
-		/* bit[0] */
+		/* bit[4:0] */
 #define	MOTOR1_SERIAL_INTERFACE_G10_8_ENABLE	0x01
-#define	MOTOR1_SERIAL_INTERFACE_G10_8_DISABLE	0x00
-		/* bit[1] */
 #define	LED_OUT_G11_ENABLE			0x02
-#define	LED_OUT_G11_DISABLE			0x00
-		/* bit[2] */
 #define	SLAVE_SERIAL_INTERFACE_G15_14_ENABLE	0x04
-#define	SLAVE_SERIAL_INTERFACE_G15_14_DISABLE	0x00
-		/* bit[3] */
 #define	SHUTTLE_CCD_ENABLE			0x08
-#define	SHUTTLE_CCD_DISABLE			0x00
-		/* bit[4] */
 #define	HARDWARE_RESET_ESIC_AFE_ENABLE		0x10
-#define	HARDWARE_RESET_ESIC_AFE_DISABLE		0x00
 
 #define		ES01_79_AFEMCLK_SDRAMCLK_DELAY_CONTROL	0x79
 		/* bit[3:0] */
@@ -364,7 +352,6 @@ typedef enum
 #define		ES01_86_DisableAllClockWhenIdle		0x86
 		/* bit[0] */
 #define	CLOSE_ALL_CLOCK_ENABLE			0x01
-#define	CLOSE_ALL_CLOCK_DISABLE			0x00
 
 #define		ES01_87_SDRAM_Timing			0x87
 
@@ -416,15 +403,10 @@ typedef enum
 #define		ES01_93_MotorWatchDogTime		0x93
 
 #define		ES01_94_PowerSaveControl		0x94
-		/* bit[0] */
+		/* bit[2:0] */
 #define	TIMER_POWER_SAVE_ENABLE			0x01
-#define	TIMER_POWER_SAVE_DISABLE		0x00
-		/* bit[1] */
 #define	USB_POWER_SAVE_ENABLE			0x02
-#define	USB_POWER_SAVE_DISABLE			0x00
-		/* bit[2] */
 #define	USB_REMOTE_WAKEUP_ENABLE		0x04
-#define	USB_REMOTE_WAKEUP_DISABLE		0x00
 		/* bit[5:4] */
 #define	LED_MODE_ON				0x00
 #define	LED_MODE_OFF				0x10
@@ -443,7 +425,6 @@ typedef enum
 #define	AD9826_AFE				0x01
 		/* bit[1] */
 #define	AUTO_CHANGE_AFE_GAIN_OFFSET_ENABLE	0x02
-#define	AUTO_CHANGE_AFE_GAIN_OFFSET_DISABLE	0x00
 
 #define		ES01_9B_ShadingTableAddrA14_A21		0x9B
 #define		ES01_9C_ShadingTableAddrODDA12_A19	0x9C
@@ -467,12 +448,9 @@ typedef enum
 #define		ES01_A5_HostEndAddr16_21		0xA5
 
 #define		ES01_A6_MotorOption			0xA6
-		/* bit[0] */
+		/* bit[1:0] */
 #define	MOTOR_0_ENABLE				0x01
-#define	MOTOR_0_DISABLE				0x00
-		/* bit[1] */
 #define	MOTOR_1_ENABLE				0x02
-#define	MOTOR_1_DISABLE				0x00
 		/* bit[3:2] */
 #define	HOME_SENSOR_0_ENABLE			0x00
 #define	HOME_SENSOR_1_ENABLE			0x04
@@ -502,12 +480,9 @@ typedef enum
 #define	MOTOR1_GPO_VALUE_1			0x04
 #define	MOTOR1_GPO_VALUE_2			0x08
 #define	MOTOR1_GPO_VALUE_3			0x0C
-		/* bit[4] */
+		/* bit[5:4] */
 #define	GPO_OUTPUT_ENABLE			0x10
-#define	GPO_OUTPUT_DISABLE			0x00
-		/* bit[5] */
 #define	SERIAL_PORT_CONTINUOUS_OUTPUT_ENABLE	0x20
-#define	SERIAL_PORT_CONTINUOUS_OUTPUT_DISABLE	0x00
 
 #define		ES01_AC_MotorPWMJamRangeLSB		0xAC
 #define		ES01_AD_MotorPWMJamRangeMSB		0xAD
@@ -547,7 +522,6 @@ typedef enum
 #define		ES01_CC_PHTGTimingAdjust		0xCC
 		/* bit[0] */
 #define	PHTG_INVERT_OUTPUT_ENABLE		0x01
-#define	PHTG_INVERT_OUTPUT_DISABLE		0x00
 		/* bit[1] */
 #define	TWO_TG					0x01
 #define	MULTI_TG				0x00
@@ -604,30 +578,15 @@ typedef enum
 #define		ES01_DD_PH1234_IN_DUMMY_TG		0xDD
 
 #define		ES01_DE_CCD_SETUP_REGISTER		0xDE
-		/* bit[0] */
+		/* bit[7:0] */
 #define	LINE_SCAN_MODE_ENABLE_ES01		0x01
-#define	LINE_SCAN_MODE_DISABLE_ES01		0x00
-		/* bit[1] */
 #define	CIS_SENSOR_MODE_ENABLE_ES01		0x02
-#define	CIS_SENSOR_MODE_DISABLE_ES01		0x00
-		/* bit[2] */
 #define	CIS_LED_OUTPUT_RtoGtoB_ES01		0x04
-#define	CIS_LED_OUTPUT_RGB_ES01			0x00
-		/* bit[3] */
 #define	CIS_LED_INVERT_OUTPUT_ES01		0x08
-#define	CIS_LED_NORMAL_OUTPUT_ES01		0x00
-		/* bit[4] */
 #define	ACC_IN_IDLE_ENABLE_ES01			0x10
-#define	ACC_IN_IDLE_DISABLE_ES01		0x00
-		/* bit[5] */
 #define	EVEN_ODD_ENABLE_ES01			0x20
-#define	EVEN_ODD_DISABLE_ES01			0x00
-		/* bit[6] */
 #define	ALTERNATE_EVEN_ODD_ENABLE_ES01		0x40
-#define	ALTERNATE_EVEN_ODD_DISABLE_ES01		0x00
-		/* bit[7] */
 #define	RESET_CCD_STATE_ENABLE_ES01		0x80
-#define	RESET_CCD_STATE_DISABLE_ES01		0x00
 
 #define		ES01_DF_ICG_CONTROL			0xDF
 		/* bit[2:0] */
@@ -639,7 +598,7 @@ typedef enum
 #define	BEFORE_PHRS_416_3t_ns			0x05
 #define	BEFORE_PHRS_416_2t_ns			0x06
 #define	BEFORE_PHRS_416_1t_ns			0x07
-		/* bit[2:0] */
+		/* bit[6:4] */
 #define	ICG_UNIT_1_PIXEL_TIME			0x00
 #define	ICG_UNIT_4_PIXEL_TIME			0x10
 #define	ICG_UNIT_8_PIXEL_TIME			0x20
@@ -670,35 +629,19 @@ typedef enum
 #define		ES01_F2_ScanImageStep16_19		0xF2
 
 #define		ES01_F3_ActionOption			0xF3
-		/* bit[0] */
+		/* bit[7:0] */
 #define	MOTOR_MOVE_TO_FIRST_LINE_ENABLE		0x01
-#define	MOTOR_MOVE_TO_FIRST_LINE_DISABLE	0x00
-		/* bit[1] */
 #define	MOTOR_BACK_HOME_AFTER_SCAN_ENABLE	0x02
-#define	MOTOR_BACK_HOME_AFTER_SCAN_DISABLE	0x00
-		/* bit[2] */
 #define	SCAN_ENABLE				0x04
-#define	SCAN_DISABLE				0x00
-		/* bit[3] */
 #define	SCAN_BACK_TRACKING_ENABLE		0x08
-#define	SCAN_BACK_TRACKING_DISABLE		0x00
-		/* bit[4] */
 #define	INVERT_MOTOR_DIRECTION_ENABLE		0x10
-#define	INVERT_MOTOR_DIRECTION_DISABLE		0x00
-		/* bit[5] */
 #define	UNIFORM_MOTOR_AND_SCAN_SPEED_ENABLE	0x20
-#define	UNIFORM_MOTOR_AND_SCAN_SPEED_DISABLE	0x00
-		/* bit[6] */
 #define STATIC_SCAN_ENABLE_ES01			0x40
-#define STATIC_SCAN_DISABLE_ES01		0x00
-		/* bit[7] */
 #define	MOTOR_TEST_LOOP_ENABLE			0x80
-#define	MOTOR_TEST_LOOP_DISABLE			0x00
 
 #define		ES01_F4_ActiveTrigger			0xF4
 		/* bit[0] */
 #define	ACTION_TRIGGER_ENABLE			0x01
-#define	ACTION_TRIGGER_DISABLE			0x00
 
 #define		ES01_F5_ScanDataFormat			0xF5
 		/* bit[0] */
@@ -733,7 +676,6 @@ typedef enum
 #define		ES01_F7_DigitalControl			0xF7
 		/* bit[0] */
 #define	DIGITAL_REDUCE_ENABLE			0x01
-#define	DIGITAL_REDUCE_DISABLE			0x00
 		/* bit[3:1] */
 #define	DIGITAL_REDUCE_1_1			0x00
 #define	DIGITAL_REDUCE_1_2			0x02
@@ -756,30 +698,15 @@ typedef enum
 #define		ES01_FE_MotorFixedspeedMSB		0xFE
 
 #define		ES01_FF_SCAN_IMAGE_OPTION		0xFF
-		/* bit[0] */
+		/* bit[7:0] */
 #define	OUTPUT_HORIZONTAL_PATTERN_ENABLE	0x01
-#define	OUTPUT_HORIZONTAL_PATTERN_DISABLE	0x00
-		/* bit[1] */
 #define	OUTPUT_VERTICAL_PATTERN_ENABLE		0x02
-#define	OUTPUT_VERTICAL_PATTERN_DISABLE		0x00
-		/* bit[2] */
 #define	BYPASS_DARK_SHADING_ENABLE		0x04
-#define	BYPASS_DARK_SHADING_DISABLE		0x00
-		/* bit[3] */
 #define	BYPASS_WHITE_SHADING_ENABLE		0x08
-#define	BYPASS_WHITE_SHADING_DISABLE		0x00
-		/* bit[4] */
 #define	BYPASS_PRE_GAMMA_ENABLE			0x10
-#define	BYPASS_PRE_GAMMA_DISABLE		0x00
-		/* bit[5] */
 #define	BYPASS_CONVOLUTION_ENABLE		0x20
-#define	BYPASS_CONVOLUTION_DISABLE		0x00
-		/* bit[6] */
 #define	BYPASS_MATRIX_ENABLE			0x40
-#define	BYPASS_MATRIX_DISABLE			0x00
-		/* bit[7] */
 #define	BYPASS_GAMMA_ENABLE			0x80
-#define	BYPASS_GAMMA_DISABLE			0x00
 
 /*******************************************************************/