UPD750106GBA データシートの表示（PDF） - NEC => Renesas Technology

部品番号

コンポーネント説明

メーカー

UPD750106GBA

4 BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD750104, 750106, 750108, 750104(A), 750106(A), 750108(A)

Figure 6-1. Clock Generator Block Diagram

XT1

Subsystem

fXT

clock generator

XT2

CL1

Main system

fCC

clock generator

CL2 RC oscillation

Clock timer

• Basic interval timer (BT)

• Timer/event counter

• Timer counter

• Serial interface

• Clock timer

• INT0 noise eliminator

• Clock output circuit

1/1 to 1/4096

Frequency divider

1/2 1/4 1/16

WM.3

SCC

SCC3

SCC0

PCC

PCC0

PCC1

4

PCC2

HALTNote

PCC3

STOPNote

Oscillator

disable

signal

Selec-

tor

Selec-

tor

HALT flip-flop

S

RQ

Frequency

divider

1/4

Φ

 • CPU

 • INT0 noise

 eliminator







•

Clock

output

 circuit

PCC2, PCC3

clear signal

STOP flip-flop

QS

R

Wait release signal from BT

RESET signal

Standby release signal from

interrupt control circuit

Note Instruction execution

Remarks 1. fCC = Main system clock frequency

2. fXT = Subsystem clock frequency

3. Φ = CPU clock

4. PCC: Processor clock control register

5. SCC: System clock control register

6. One clock cycle (tCY) of the CPU clock (Φ) is equal to one machine cycle of an instruction.

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