MCP402XEV Microchip Technology, MCP402XEV Datasheet - Page 43

• Manufacturer Part Number: MCP402XEV
• Description: BOARD EVAL FOR MCP402X
• Manufacturer: Microchip Technology

Specifications of MCP402XEV

• Main Purpose: Digital Potentiometer
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP4021
• Primary Attributes: 1 Single Pot, 10 kOhm, 64 Tap, Non Volatile
• Secondary Attributes: 2.7 ~ 5.5 V, 150 ppm/°C
• Processor To Be Evaluated: MCP402X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

TABLE E-1:
© 2005 Microchip Technology Inc.
;***********************************************************************************************
; High Voltage Increment & Decrement Subroutines
;***********************************************************************************************
HV_Increment_WL_Disable
DLOOP_HVI
HV_IncrLoop
HV_Decrement_WL_Disable
DLOOP_HVD
HV_DecrLoop
HV_Increment_WL_Enable
movwf
bsf
goto
bsf
movlw
movwf
clrwdt
nop
decfsz
goto
bcf
goto
bsf
goto
decfsz
goto
bcf
bcf
goto
bsf
retlw
movwf
bcf
goto
bsf
movlw
movwf
clrwdt
nop
decfsz
goto
bsf
goto
bcf
goto
decfsz
goto
bcf
bcf
goto
bsf
retlw
bsf
goto
bsf
movlw
movwf
Exit
UD
$+1
HV_CS
.100
DLYCNT1
DLYCNT1,f
DLOOP_HVI
UD
$+1
UD
$+1
Exit,f
HV_IncrLoop
HV_CS
CS
$+1
CS
0x02
Exit
UD
$+1
HV_CS
.100
DLYCNT1
DLYCNT1,f
DLOOP_HVD
UD
$+1
UD
$+1
Exit,f
HV_DecrLoop
HV_CS
CS
$+1
CS
0x03
UD
$+1
HV_CS
.100
DLYCNT1
;or NOP
;or NOP
00066_MCP402XEV.ASM SOURCE CODE (CONTINUED)
; creates a 3us total delay
; creates a 3us total delay
; Have we decremented the wiper enough?
; shut off 1Mhz Charge Pump
; helps pull the signal down from HV
; Follow w/long delay to discharge pump & EEPROM Write Cycle
; creates a 3us total delay
; starts 1Mhz Charge Pump
; 5*100 = 500us delay for Charge Pump ramp time
00066_MCP402XEV.ASM Source Code
; load the loop counter
; creates a 3us total delay
; starts 1Mhz Charge Pump
; 5*100 = 500us delay for Charge Pump ramp time
; creates a 3us total delay
; creates a 3us total delay
; Have we incremented the wiper enough?
; shut off 1Mhz Charge Pump
; helps pull the signal down from HV
; Follow w/long delay to discharge pump & EEPROM Write Cycle
; load the loop counter
; creates a 3us total delay
; starts 1Mhz Charge Pump
; 5*100 = 500us delay for Charge Pump ramp time
DS51546B-page 39