HD6432621 Hitachi, HD6432621 Datasheet - Page 447

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

WDT1 Mode Select*
WDT1
WT/IT
0
1
Note: * Cannot be used in the H8S/2623 Series.
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
Bit 5
TME
0
1
WDT0 TCSR Bit 4—Reserved Bit: This bit is always read as 1 and cannot be modified.
WDT1 TCSR Bit 4—Prescaler Select (PSS): This bit is used to select an input clock source for
the TCNT of WDT1.
See the descriptions of Clock Select 2 to 0 for details.
This bit cannot be used in the H8S/2623 Series.
WDT1 TCSR
Bit 4
PSS
0
1
Description
Interval timer mode: WDT1 requests an interval timer interrupt (WOVI)
from the CPU when the TCNT overflows.
Watchdog timer mode: WDT1 requests a reset or an NMI interrupt from
the CPU when the TCNT overflows.
Description
TCNT is initialized to H'00 and halted
TCNT counts
Description
The TCNT counts frequency-division clock pulses of the ø based
prescaler (PSM).
The TCNT counts frequency-division clock pulses of the ø SUB-based prescaler
(PSS).
(Initial value)
(Initial value)
(Initial value)
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