UPD75068GBA 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

UPD75068GBA

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)

5.3 Clock Output Circuit

The clock output circuit outputs clock pulses from the P22/PCL pin, and is used to supply clock pulses to

remote unit controller and peripheral LSIs.

• Clock output (PCL): Φ, 524 kHz, 262 kHz, 65.5 kHz (fX = at 4.19 MHz)

Figure 5-2. Clock Output Circuit Configuration

From the clock

generator

Φ

fX / 23

fX / 24

fX / 26

Selector

Output

buffer

P22/PCL

CLOM3 0 CLOM1 CLOM0 CLOM

PORT2.2

P22 output

latch

4

Internal bus

Bit 2 of PMGB

Port 2 input/

output mode

specification bit

Remark Measures are taken to prevent outputting a narrow pulse when selecting clock output

enable/disable.

20

Share Link: