參數(shù)資料
型號: UPD17201AGF
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
中文描述: 4位單片機與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì)
文件頁數(shù): 51/120頁
文件大?。?/td> 516K
代理商: UPD17201AGF
μ
PD17201A, 17207
51
CMPVAL
ADCNV:
DAT
80H
; Reference voltage =V
ADC
×
CMPVAL/256
BANK0
INITFLG
MOV
MOV
REPT
NOP
ENDR
PUT
NOP
NOP
NOP
NOP
PEEK
VREFEN,ADCEN,NOT ADCCH1,NOT ADCCH0 ; Starts sampling of input to ADC
0
DBF0, #CMPVAL AND 0FH
DBF1, #CMPVAL SHR 4 and 0FH
9
ADCR,DBF
; Holds input and starts comparison
WR,.MF.ADCCMP SHR 4 AND 0FFFH
; Reads result of comparison (starts
sampling)
MOV
MOV
NOP
PUT
NOP
NOP
NOP
NOP
PEEK
DBF0, #CMPVAL AND 0FH
DBF1, #CMPVAL SHR 4 AND 0FH
ADCR, DBF
; Holds input and starts comparison
WR,.MF.ADCCMP SHR 4 AND 0FFFH
; Reads result of comparison (starts
sampling)
(2) When subclock is being selected as system clock
Unlike when the main clock is selected, the wait times do not need to be set in software when the subclock
is selected. Setting the A/D conversion mode, ADCR, and reading ADCCMP are completed in one instruction
cycle, respectively.
An example of a program for A/D conversion when the subclock is selected is shown below.
CMPVAL
ADCNV:
DAT
80H
; Reference voltage = V
ADC
×
CMPVAL/256
BANK0
INITFLG
VREFEN,ADCEN,NOT ADCCH1,NOT ADCCH0 ; Starts sampling a voltage input to the ADC
0
pin.
MOV
MOV
PUT
PEEK
DBF0,#CMPVAL AND 0FH
DBF1,#CMPVAL SHR 4 AND 0FH
ADCR,DBF
WR,.MF.ADCCMP SHR 4 AND 0FFFH
; Holds the Input and starts comparison
; Reads the result of comparison (and starts
sampling).
Waits for at least 11 instruction cycles
until ADCR is set
Waits for at least 4 instruction cycles until
ADCCMP is checked
Waits for at least 3 instruction cycles until
ADCR is set
Waits for at least 4 instruction cycles until
ADCCMP is checked
相關PDF資料
PDF描述
UPD17207 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
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