UPD784936A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD784936A

16-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD784935A,784936A,784937A,784938A

8.2 Clock Generator

This circuit generates a clock necessary for operation. It is also provided with a frequency divider. When high-

speed operation is not necessary, the power consumption can be lowered by reducing the internal operating frequency.

Figure 8-2. Block Diagram of Clock Generator

X1

Oscillator

X2

Clocked synchronous 3-wire serial I/O (CSI)

Asynchronous serial I/O (UART/IOE)

INTP0 noise eliminator

Oscillation stabilization timer STBC.4,5

Timer/counter

fXX

fXX/8

1/2

1/2

1/2

fXX/4

fCLK

fXX/2

To each CPU

peripheral circuit

STBC.7

1

0

Operation clock of IEBus controller Note

Watch clock

Main clock

Watch timer Note

INTW interrupt signal

Note Be sure to set bit 7 of the standby control register (STBC) to 1 when using the main clock.

Remark fXX: Oscillation frequency

fCLK: Internal operating frequency

36

Data Sheet U13572EJ2V0DS

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