RX610 Group
18. Compare Match Timer (CMT)
R01UH0032EJ0120 Rev.1.20
Page 587 of 1006
Feb 20, 2013
18.
Compare Match Timer (CMT)
The RX610 Group has two on-chip compare match timer (CMT) units (unit 0 and unit 1) each consisting of a
two-channel 16-bit timer (i.e., a total of four channels). The CMT has a 16-bit counter, and can generate interrupts at set
intervals.
18.1
Overview
Table 18.1 lists the specifications for the CMT.
Figure 18.1 shows a block diagram of the CMT (unit 0). A two-channel CMT constitutes a unit. Unit 0 and unit 1 are the
same in terms of specifications.
Table 18.1 Specifications of CMT
Item
Description
Count clock
•
Four internal clocks
One clock from PCLK/8, PCLK/32, PCLK/128, and PCLK/512 can be selected
individually for each channel.
Interrupt
A compare match interrupt can be requested individually for each channel.
Power-down function
Each unit can be placed in a module stop state.
Control unit
Clock selection
Module bus
CMI0
PCLK/32
PCLK/512
PCLK/128
PCLK/8
Control unit
Clock selection
CMI1
PCLK/32
PCLK/512
PCLK/128
PCLK/8
Bus interface
Comparator
Comparator
Internal bus
CMSTR0: Compare match timer start register 0
CMCR:
Compare match timer control register
CMCOR:
Compare match constant register
CMCNT:
Compare match timer counter
CMI:
Compare match interrupt
[Legend]
CMSTR0
CMCR
CMCOR
CMCNT
CMCR
CMCOR
CMCNT
Figure 18.1 Block Diagram of CMT (Unit 0)
Summary of Contents for RX600 Series
Page 1006: ...RX610 Group R01UH0032EJ0120 ...