Rev.6.00 Oct.28.2004 page 366
of 1016
REJ09B0138-0600H
10.2.6
Timer Counter (TCNT)
Channel 0: TCNT0 (up-counter)
Channel 1: TCNT1 (up/down-counter
*
)
Channel 2: TCNT2 (up/down-counter
*
)
Channel 3: TCNT3 (up-counter)
Channel 4: TCNT4 (up/down-counter
*
)
Channel 5: TCNT5 (up/down-counter
*
)
Bit
:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Initial value :
0
0
0
0
0
0
0
0
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 R/W R/W R/W R/W R/W R/W R/W R/W
Note:
*
These counters can be used as up/down-counters only in phase counting mode or when counting
overflow/underflow on another channel. In other cases they function as up-counters.
The TCNT registers are 16-bit counters. The TPU has six TCNT counters, one for each channel.
The TCNT counters are initialized to H'0000 by a reset, and in hardware standby mode.
The TCNT counters cannot be accessed in 8-bit units; they must always be accessed as a 16-bit unit.
10.2.7
Timer General Register (TGR)
Bit
:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Initial value :
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
R/W
: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
The TGR registers are 16-bit registers with a dual function as output compare and input capture registers. The TPU has 16
TGR registers, four each for channels 0 and 3 and two each for channels 1, 2, 4, and 5. TGRC and TGRD for channels 0
and 3 can also be designated for operation as buffer registers*. The TGR registers are initialized to H'FFFF by a reset, and
in hardware standby mode.
The TGR registers cannot be accessed in 8-bit units; they must always be accessed as a 16-bit unit.
Note: * TGR buffer register combinations are TGRA—TGRC and TGRB—TGRD.
10.2.8
Timer Start Register (TSTR)
Bit
:
7
6
5
4
3
2
1
0
—
—
CST5
CST4
CST3
CST2
CST1
CST0
Initial value :
0
0
0
0
0
0
0
0
R/W
:
—
—
R/W
R/W
R/W
R/W
R/W
R/W
TSTR is an 8-bit readable/writable register that selects operation/stoppage for channels 0 to 5. TSTR is initialized to H'00
by a reset, and in hardware standby mode. When setting the operating mode in TMDR or setting the count clock in TCR,
first stop the TCNT counter.
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