PD178046_15 Datasheet, PDF (21/42 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD178046, 178048
3.2 Clock Generation Circuit
The instruction execution time can be changed as follows:
• 0.4 µs/0.8 µs/1.6 µs/3.2 µs/6.4 µs (system clock: 5.0-MHz crystal resonator)
Figure 3-1. Block Diagram of Clock Generation Circuit
X1
System clock
oscillation
X2
circuit
Prescaler
fX
STOP
fX fX fX fX
2 2² 2³ 2⁴
Prescaler
Clock to peripheral hardware
other than above
Standby
control
circuit
Wait
control
circuit
CPU
clock
(fCPU)
3.3 Timers
Six timer channels are provided.
• Basic timer
: 1 channel
• 8-bit timer/event counter : 1 channel
• 8-bit timer
: 1 channel
• 8-bit event counter
: 1 channel
• 8-bit remote control timer : 1 channel
• Watchdog timer
: 1 channel
Figure 3-2. Block Diagram of Basic Timer (BTM1)
5.0 MHz
Divider
INTBTM1
Basic timer 1 mode register
(BTMMD1)
BTMSEL
Internal bus
Preliminary Product Information
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