Section 14 Compare Match Timer (CMT)
TIMCMT3A_000020030900
Rev. 3.00 Sep. 27, 2007 Page 501 of 758
REJ09B0243-0300
Section 14 Compare Match Timer (CMT)
This LSI has an on-chip compare match timer (CMT) consisting of a 2-channel 16-bit timer. The
CMT has a16-bit counter, and can generate interrupts at set intervals.
14.1 Features
•
Selection of four counter input clocks
Any of four internal clocks (P
φ
/8, P
φ
/32, P
φ
/128, and P
φ
/512) can be selected independently
for each channel.
•
Interrupt request on compare match
•
Module standby mode can be set.
Figure 14.1 shows a block diagram of CMT.
Control circuit
Clock selection
CMSTR
CMCSR_0
CMCOR_0
CMCNT_0
Channel 0
Channel 1
CMT
P
φ
/8
CMCSR_1
CMCOR_1
CMCNT_1
P
φ
/32
P
φ
/128
P
φ
/512
P
φ
/8
P
φ
/32
P
φ
/128
P
φ
/512
Clock selection
Control circuit
Comparator
Comparator
[Legend]
CMSTR:
Compare match timer start register
CMCSR:
Compare match timer control/status register
CMCOR: Compare match timer constant register
CMCNT:
Compare match counter
CMI:
Compare match interrupt
Module bus
Bus
interface
Internal bus
CMI0
CMI1
Figure 14.1 Block Diagram of CMT
Содержание SH7124 R5F7124
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