Clock Output Circuit - NEC mPD75512 Datasheet

6.3

CLOCK OUTPUT CIRCUIT

The clock output circuit outputs clock pulse from the P22/PCL pin. This clock pulse is used for the remote control
output, peripheral LSIs, etc.
• Clock output (PCL): Φ, 524, 262, 65.5 kHz (operating at 4.19 MHz)
• Buzzer output (BUZ): 2 kHz, (operating at 4.19 MHz, or 32.768 kHz)
From the
clock
generator
Φ
3
f /2
X
4
f /2
X
6
f /2
X
CLOM3 CLOM2 CLOM1 CLOM0 CLOM
Remarks:
A measures to prevent outputting narrow width pulse when selecting clock output enable/
disable is taken.
Selector
4
Internal bus
Fig. 6-2 Clock Output Circuit Configuration
Output
buffer
PORT2.2
Port 2 input/
output mode
P22 output
specification
latch
bit
µ PD75512
PCL/P22
Bit 2 of PMGB
21