D780232 データシートの表示（PDF） - NEC => Renesas Technology

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D780232

8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD780232

5.4 A/D Converter

An 8-bit resolution 4-channel A/D converter is incorporated.

A/D conversion can be started by software only.

Figure 5-6. A/D Converter Block Diagram

ANI0

ANI1

ANI2

ANI3

Sample &

hold circuit

A/D converter

(8 bits)

INTAD

A/D conversion

result register

(ADCR0)

Internal bus

5.5 Serial Interface

Two clocked serial interface channels are incorporated.

Serial interface SIO1 operates in the 3-wire serial mode (with automatic transmit/receive function), in which MSB

first/LSB first switching is possible.

Serial interface SIO3 operates in the 2-wire serial mode (transmit only) in which the first bit is fixed to MSB.

Figure 5-7. Serial Interface SIO1 Block Diagram

Internal bus

Automatic data transmit/receive

address pointer (ADTP)

Buffer RAM

SI1/P26

SO1/P25

BUSY/P24

SCK1/P27

Serial shift register 1 (SIO1)

Handshake

controller

Serial clock counter

Serial clock controller

Automatic data transmit/receive

transfer interval specification register

(ADTI)

Match

5-bit counter

Interrupt request

signal generator

INTCSI1

fX/22 to fX/24

18

Data Sheet U13415EJ2V0DS

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