Timer Counter (Tcnt) - Hitachi H8S/2646 Hardware Manual

Hitachi 16-bit single-chip microcomputer h8s/2646 series
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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
Initial value :
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.
14
13
12
11
10
0
0
0
0
9
8
7
6
0
0
0
0
0
5
4
3
2
1
0
0
0
0
0
0
0
331

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