UPD75212ACW データシートの表示（PDF） - NEC => Renesas Technology

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UPD75212ACW

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75212A

Fig. 5-6 Timer/Pulse Generator Block Diagram (PWM Pulse Generation Mode)

TPGM3

Internal Bus

8

MODH

8

MODL

Modulo Register H (8) Modulo Register L (6) (2)

TPGM1

fx 1/2

Frequency Divider

MODH (8)

MODL7-2 (6)

Modulo Latch (14)

PWM Pulse Generator

Selector

Output Buffer

PPO

INTTPG

(IRQTPG Set Signal)

TPGM5

( 215 = 7.81 ms : at 4.19 MHz operation)

fX

TPGM7

5.7 SERIAL INTERFACE

The µPD75212A serial interface has the following functions.

• Clocked 8-bit send/receive operation (simultaneous send/receive)

• Clocked 8-bit serial bus operation (data input/output from the SO pin. N-ch open-drain SO output)

• Start LSB/MSB switching

The above functions facilitate data communication with another microcomputer of µPD7500 series and 78K series

via serial bus and coupling with peripheral devices.

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