h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 479

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

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), an interval timer interrupt (WOVI) is generated, depending on the mode selected by
the WT/
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 see
Bit
Initial value :
R/W
section 12.2.4, Notes on Register Access.
I T
Register Descriptions
Timer Counter (TCNT)
bit in TCSR.
:
:
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
Rev. 6.00 Feb 22, 2005 page 419 of 1484
R/W
3
0
Section 12 Watchdog Timer
R/W
2
0
REJ09B0103-0600
R/W
1
0
R/W
0
0