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UPD17P136ACT Datasheet(PDF) 156 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 156 Page - NEC

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CHAPTER 13 PERIPHERAL HARDWARE
137
(c) Successive mode A/D conversion timing
Figure 13-16 shows the A/D conversion timing in the successive mode.
Figure 13-19. A/D Conversion Timing in the Continuous Mode
Caution Sampling is executed eight times while A/D conversion is performed once. Therefore, if the
analog input voltage changes substantially during A/D conversion, conversion is not performed
accurately. To obtain the accurate conversion result, it is necessary to keep changes in the
analog input voltage as small as possible during A/D conversion.
One sampling time = 14/fx (1.75
µs, 8 MHzNote)
Sampling repeat cycle = 48/fx (6
µs, 8 MHzNote)
Note
The guaranteed oscillation range of the
µPD17134A, 17136A, and 17P136A is 400 kHz to 2.4 MHz.
Number of instruction to be executed (Instruction cycle)
POKE
123456789
24
GET
Read ADCR
Sampling
Sampling
Sampling
Set ADCSTRT
Previous
data
Initial value
80H
Most significant
bit determined
High-order 2 bits
are determined
ADCSTRT
ADCEND
8-bit data
register
All eight bits
are vaild.



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