M16C62_M Datasheet, PDF (342/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Timer A
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Selecting event counter mode and functions
b7
b0
11 0 10 0 0 1
Timer Ai mode register (i= 3, 4) [Address 039916, 039A16]
TAiMR (i= 3, 4)
Selection of event counter mode
0 (Must always be “0” when using two-phase pulse signal processing)
0 (Must always be “0” when using two-phase pulse signal processing)
1 (Must always be “1” when using two-phase pulse signal processing)
0 (Must always be “0” when using two-phase pulse signal processing)
Count operation type select bit
1 : Free-run type
Two-phase pulse signal processing operation select bit (Note 1)
1 : Multiply-by-4 processing operation
Note 1: This bit is valid for timer A3 mode register. For timer A4 mode register, this bit can be “0” or “1”.
Setting two-phase pulse signal processing select bit
b7
b0 _{Up/down flag [address 038416]}
UDF
Timer A3 two-phase pulse signal processing select bit (Note 2)
1 : Two-phase pulse signal processing enabled
Timer A4 two-phase pulse signal processing select bit (Note 2)
1 : Two-phase pulse signal processing enabled
Note 2: Set the TAiIN, TAiOUT corresponding port direction register to “0”.
Setting trigger select register
b7
b0
Trigger select register [Address 038316]
TRGSR
Timer A3 event/trigger select bit
b5 b4
0 0 : Input on TA3IN is selected (Note 3)
Timer A4 event/trigger select bit
b7 b6
0 0 : Input on TA4IN is selected (Note 3)
Note 3: Set the corresponding port direction register to “0”.
Setting counter value
(b15)
b7
(b8)
b0 b7
b0 _{Timer A3 register [Address 038D16, 038C16] TA3}
Timer A4 register [Address 038F16, 038E16] TA4
Can be set to 000016 to FFFF16
Setting count start flag
b7
b0
Count start flag [Address 038016]
TABSR
Timer A3 count start flag
Timer A4 count start flag
Start count
Figure 2.2.19. Set-up procedure of 2-phase pulse signal process in event counter mode, multiply-by-4 mode selected
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