upd75112 Renesas Electronics Corporation., upd75112 Datasheet - Page 16

• Manufacturer Part Number: upd75112
• Description: 4-bit Single Chip-microcomputer
• Manufacturer: Renesas Electronics Corporation.

16
Figure 5-1 Block Diagram of Clock Generator
Remarks 1: f
PD75112, 75116
Inter-
nal
Bus
2: f
3:
4: *indicates instruction execution.
5: PCC (processor clock control register)
6: 1 clock cycle (t
HALT*
STOP*
4
tion. For t
trical Specifications".
XX
X
=CPU clock
=external clock frequency.
=crystal/ceramic oscillator frequency.
PCC0
PCC1
PCC2
PCC3
PCC2,
PCC3
Crear
PCC
X1
X2
CY
, see the AC characteristics in the 12."Elec-
CY
) of
System
Clock
Oscillator
is 1 michine cycle of the instruc-
Oscillation Stop
STOP F/F
Q
S
R
fxx or
fx
1/2 1/16
Selec-
tor
1/8 to 1/4096
Frequency Divider
HALT F/F
S
R
Q
Basic Interval Timer (BT)
Clock Generator
Timer/Event Counter
Serial Interface
Clock Output Circuit
Wait Release Signal from BT
RES(Internal Reset) Signal
Standby Release Signal from
the Interrupt Control Circuit
Frequency
Divider
1/4
• CPU
• Clock Output Circuit