HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 368

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

14.3.2
TCSR selects the clock source to be input to TCNT, and the timer mode.
Rev. 2.0, 08/02, page 328 of 788
Bit
7
6
5
4
3
TCSR_0
Bit Name
OVF
WT/,7
TME
—
RST/10, 0
Timer Control/Status Register (TCSR)
Initial
Value
0
0
0
0
R/W
R/(W)*
R/W
R/W
R/(W)
R/W
1
Description
Overflow Flag
Indicates that TCNT has overflowed (changes from H’FF
to H’00).
[Setting condition]
When TCNT overflows (changes from H’FF to H’00)
However, when internal reset request generation is
selected in watchdog timer mode, OVF is cleared
automatically by the internal reset.
[Clearing conditions]
Timer Mode Select
Selects whether the WDT is used as a watchdog timer or
interval timer.
0: Interval timer mode
1: Watchdog timer mode
Timer Enable
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and is
initialized to H'00.
Reserved
The initial value should not be modified.
Reset or NMI
Selects to request an internal reset or an NMI interrupt
when TCNT has overflowed.
0: An NMI interrupt is requested
1: An internal reset is requested
When TCSR is read when OVF = 1*
written to OVF
When 0 is written to TME
2
, then 0 is