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H8S2245 Datasheet(PDF) 355 Page - Renesas Technology Corp

Part # H8S2245
Description  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S2245 Datasheet(HTML) 355 Page - Renesas Technology Corp

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Section 9 16-Bit Timer Pulse Unit (TPU)
Rev.3.00 Mar. 26, 2007 Page 313 of 772
REJ09B0355-0300
9.2.6
Timer Counter (TCNT)
15
0
R/W
14
0
R/W
13
0
R/W
12
0
R/W
11
0
R/W
8
0
R/W
10
0
R/W
9
0
R/W
Bit
Initial value
R/W
:
:
:
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
0
0
R/W
2
0
R/W
1
0
R/W
Channel 0: TCNT0 (up-counter)
Channel 1: TCNT1 (up/down-counter*)
Channel 2: TCNT2 (up/down-counter*)
Note: * These counters can be used as up/down-counters only in phase counting mode.
In other cases they function as up-counters.
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
Timer General Register (TGR)
15
1
R/W
14
1
R/W
13
1
R/W
12
1
R/W
11
1
R/W
8
1
R/W
10
1
R/W
9
1
R/W
Bit
Initial value
R/W
:
:
:
7
1
R/W
6
1
R/W
5
1
R/W
4
1
R/W
3
1
R/W
0
1
R/W
2
1
R/W
1
1
R/W
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.



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