UPD17073 NEC, UPD17073 Datasheet - Page 103
UPD17073
Manufacturer Part Number
UPD17073
Description
4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
Manufacturer
NEC
Datasheet
1.UPD17073.pdf
(226 pages)
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reset
At
A/D converter
compare start
register
Remarks 1. Even if the A/D converter channel select register or A/D converter reference voltage setting register
Power-ON
Clock stop
CE
Name
2. The ADCSTRT flag is cleared to “0” only when the voltage comparison operation by the comparator
is manipulated when ADCSTRT = 1 (when comparison by the comparator is in progress), the
contents of the register remain unchanged. Therefore, the operating status of the A/D converter
cannot be changed while the comparator is operating.
is completed or when the “STOP s” instruction is executed.
Figure 13-6. Configuration of A/D Converter Compare Start Register
b
0
0
3
Flag symbol
b
0
0
2
b
0
0
1
b
A
D
C
S
T
R
T
0
1
0
0
0
0
Operation stops (compare completes)
Operating (analog voltage comparison
in progress)
Fixed to 0
(BANK1)
Checks operating status of comparator
Address
5EH
Read/
Write
R/W
Read
Sets start of compare operation by comparator
Invalid
Start
PD17072,17073
Write
103
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