SH7040 Datasheet, PDF (350/923 Pages) Renesas Technology Corp – Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

12.2.6 Timer Counters (TCNT)
The timer counters (TCNT) are 16-bit counters, with one for each channel, for a total of five.
The TCNT are initialized to H'0000 by a power-on reset and when in standby mode. Manual reset
does not initialize TCNT. Accessing the TCNT counters in 8-bit units is prohibited. Always access
in 16-bit units.
Channel Abbreviation Function
0
TCNT0
Increment counter
1
TCNT1
Increment/decrement counter^*1
2
TCNT2
Increment/decrement counter^*1
3
TCNT3
Increment/decrement counter^*2
4
TCNT4
Increment/decrement counter^*2
Notes: *1 Can only be used as an increment/decrement counter in phase counting mode, with
other channel overflow/underflow counting. It becomes an increment counter in all other
cases.
*2 Can only be used as an increment counter in complementary PWM mode. It becomes
an increment counter in all other cases.
Bit: 15
14
13
12
11
10
9
8
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 7
6
5
4
3
2
1
0
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
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