HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 616
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 16 Compare Match Timer (CMT)
16.3
16.3.1
The CMT starts the operation of the counter by writing a 1 to the STRn bit in CMSTR of a
channel that has been selected for operation. Complete all of the settings before starting the
operation. Do not change the register settings other than by clearing flag bits.
The counter operates in one of two ways.
• One-Shot Operation
Rev. 3.00 Jan. 18, 2008 Page 554 of 1458
REJ09B0033-0300
One-shot operation is selected by setting the CMM bit in CMCSR to 0. When the value in
CMCNT matches the value in CMCOR, the value in CMCNT is cleared to H'00000000 and
the CMF bit in CMCSR is set to 1. Counting by CMCNT stops after it has been cleared.
To detect an overflow interrupt, set the value in CMCOR to H'FFFFFFFF. When the value in
CMCNT matches the value in CMCOR, CMCNT is cleared to H'00000000 and bits CMF and
OVF in CMCSR are set to 1.
H'00000000
CMCOR
Value in
CMCNT
Operation
Counter Operation
Figure 16.2 Counter Operation (One-Shot Operation)
CMF = 1
OVF = 1 (When an overflow is detected)
Time
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