A/D Converter Block Diagram - NEC PD78056F User Manual

Pd78058f series; pd78058fy series 8-bit single-chip microcontrollers
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Internal Bus
A/ D Converter Input Select Register
ADIS3
ADIS2 ADIS1 ADIS0
4
ANI0/P10
ANI1/P11
ANI2/P12
Note 1
ANI3/P13
ANI4/P14
ANI5/P15
ANI6/P16
ANI7/P17
INTP3/P03
Note 3
ES40, ES41
Trigger Enable
CS
TRG FR1 FR0 ADM3 ADM2 ADM1
A/D Converter Mode Register
Notes 1. Selector to select the number of channels to be used for analog input.
2. Selector to select the channel for A/D conversion.
3. Bits 0 and 1 of External Interrupt Mode Register 1 (INTM1)
CHAPTER 14 A/D CONVERTER
Figure 14-1. A/D Converter Block Diagram
Sample & Hold Circuit
Note 2
AV
SS
3
ADM1 to ADM3
Edge
Detector
3
Series Resistor String
Voltage
Comparator
Successive
Approximation
Register (SAR)
Control
Circuit
A/ D Conversion
HSC
Result Register
(ADCR)
Internal Bus
AV
DD
AV
REF0
AV
SS
INTAD
INTP3
263

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