HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 355

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

9.2.6
The TCNT registers are 16-bit counters. The TPU has three 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.
9.2.7
The TGR registers are 16-bit registers with a dual function as output compare and input capture
registers. The TPU has 8 TGR registers, four for channel 0 and two each for channels 1, and 2.
TGRC and TGRD for channel 0 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.
Channel 0: TCNT0 (up-counter)
Channel 1: TCNT1 (up/down-counter*)
Channel 2: TCNT2 (up/down-counter*)
Bit
Initial value
R/W
Note: * These counters can be used as up/down-counters only in phase counting mode.
Bit
Initial value
R/W
Timer Counter (TCNT)
Timer General Register (TGR)
In other cases they function as up-counters.
:
:
:
:
:
:
R/W
R/W
15
15
0
1
R/W
R/W
14
14
0
1
R/W
R/W
13
13
0
1
R/W
R/W
12
12
0
1
R/W
R/W
11
11
0
1
R/W
R/W
10
10
0
1
R/W
R/W
9
0
9
1
R/W
R/W
8
0
8
1
Rev.3.00 Mar. 26, 2007 Page 313 of 772
R/W
R/W
Section 9 16-Bit Timer Pulse Unit (TPU)
7
0
7
1
R/W
R/W
6
0
6
1
R/W
R/W
5
0
5
1
R/W
R/W
4
0
4
1
R/W
R/W
3
0
3
1
REJ09B0355-0300
R/W
R/W
2
0
2
1
R/W
R/W
1
0
1
1
R/W
R/W
0
0
0
1