Rev. 2.0, 11/00, page 432 of 1037
22.1.2
Block Diagram
Figure 22.1 shows a block diagram of the prescalar unit.
PWM3
ICR1
PCSR
18-bit free running counter (FRC)
w/128
Prescalar W
/131072 to /2
Prescalar S
Internal data bus
MSB
LSB
w/4
w/8
w/16
w/32
/32
/16
/8
/4
Interrupt
request
5-bit counter
IC pin
Stable oscillation
wait time count output
2
12
2
15
2
8
2
17
2
7
2
8
TMOW
pin
MSB
LSB
8 bits
6 bits
8 bits
PWM2
PWM1
PWM0
[Legend]
ICR1
PCSR
: Input capture register 1
: Prescalar unit control/status register
IC
TMOW
: Input capture input pin
: Frequency division clock output pin
Figure 22.1 Block Diagram of Prescalar Unit
Summary of Contents for Hitachi H8S/2191
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