MCP402XEV Microchip Technology, MCP402XEV Datasheet - Page 38

• 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.
State4
State5
Loop5_2sec
;
;
HV_IncrExit clrwdt
State6
Loop6_2sec
;
;
call
movlw
call
clrf
retlw
movlw
movwf
call
movlw
call
btfsc
retlw
call
movlw
call
btfsc
retlw
decfsz
goto
call
movlw
call
movlw
call
call
movlw
call
btfss
goto
call
movlw
call
btfss
goto
clrf
retlw
movlw
movwf
call
movlw
call
btfsc
retlw
call
movlw
call
btfsc
retlw
decfsz
goto
call
movlw
call
movlw
call
InitGPIO
.1
LV_Decrement
State
.4
.200
Exit
GPIO_TestUP
.5
VAR1000TcyDELAY
UP
.5
GPIO_TestDOWN
.5
VAR1000TcyDELAY
DOWN
.5
Exit,f
Loop5_2sec
InitGPIO
.64
HV_Increment_WL_Disable
.4
VAR1000TcyDELAY
GPIO_TestDOWN
.10
VAR1000TcyDELAY
DOWN
HV_IncrExit
GPIO_TestUP
.10
VAR1000TcyDELAY
UP
HV_IncrExit
State
.5
.200
Exit
GPIO_TestUP
.5
VAR1000TcyDELAY
UP
.6
GPIO_TestDOWN
.5
VAR1000TcyDELAY
DOWN
.6
Exit,f
Loop6_2sec
InitGPIO
.64
HV_Decrement_WL_Disable
.4
VAR1000TcyDELAY
00066_MCP402XEV.ASM SOURCE CODE (CONTINUED)
; make GP0/DECR/CS & GP1/INCR/UD outputs, block undesired U/D commands
; make GP0/DECR/CS & GP1/INCR/UD outputs, block undesired U/D commands
; make GP0/DECR/CS & GP1/INCR/UD outputs, block undesired U/D commands
00066_MCP402XEV.ASM Source Code
; LV Decrement
; Both buttons pressed
; 200x10mS = 2s
; make GP1/INCR/UD an input (w/pu enabled)
; 5ms delay
; if UP gets released, exit
; make GP0/DECR/CS an input (w/pu enabled)
; 5ms delay
; if DOWN gets released, exit
; add a 4mS delay for E/W cycle
; make GP0/DECR/CS an input (w/pu enabled)
; add a 10mS delay for settling time
; if DOWN gets released, exit
; make GP1/INCR/UD an input (w/pu enabled)
; add a 10mS delay for settling time
; if UP gets released, exit
; 200x10mS = 2s
; make GP1/INCR/UD an input (w/pu enabled)
; 5ms delay
; if UP gets released, exit
; make GP0/DECR/CS an input (w/pu enabled)
; 5ms delay
; if DOWN gets released, exit
; add a 4mS delay for E/W cycle
DS51546B-page 34