H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 568
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H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
(1025 pages)
- Current page: 568 of 1025
- Download datasheet (6Mb)
Section 12 Watchdog Timer (WDT)
12.2
12.2.1
TCNT is an 8-bit readable/writable * up-counter.
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from the internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), either the watchdog timer overflow signal (WDTOVF) or an interval timer interrupt
(WOVI) is generated, depending on the mode selected by the WT/IT bit in TCSR.
TCNT is initialized to H'00 by a reset, in hardware standby mode, or when the TME bit is cleared
to 0. It is not initialized in software standby mode.
Note: * TCNT is write-protected by a password to prevent accidental overwriting. For details
12.2.2
TCSR is an 8-bit readable/writable * register. Its functions include selecting the clock source to be
input to TCNT, and the timer mode.
TCR is initialized to H'18 by a reset and in hardware standby mode. It is not initialized in software
standby mode.
Note: * TCSR is write-protected by a password to prevent accidental overwriting. For details
Rev. 3.00 Sep 15, 2006 page 534 of 988
REJ09B0330-0300
Bit
Initial value
R/W
Bit
Initial value
R/W
Note: * Can only be written with 0 for flag clearing.
Register Descriptions
Timer Counter (TCNT)
Timer Control/Status Register (TCSR)
see section 12.2.4, Notes on Register Access.
see section 12.2.4, Notes on Register Access.
:
:
:
:
:
:
R/(W)*
OVF
R/W
7
0
7
0
WT/IT
R/W
R/W
6
0
6
0
TME
R/W
R/W
5
0
5
0
R/W
—
—
4
0
4
1
R/W
—
—
3
0
3
1
CKS2
R/W
R/W
2
0
2
0
CKS1
R/W
R/W
1
0
1
0
CKS0
R/W
R/W
0
0
0
0
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