MB90F654A FUJITSU [Fujitsu Component Limited.], MB90F654A Datasheet - Page 59

• Manufacturer Part Number: MB90F654A
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

11. Watchdog Timer, Timebase Timer, and Watch Timer
(1) Register Configuration
The watchdog timer consists of a 2-bit watchdog counter that uses the carry signal from the 18-bit timebase
timer or the 15-bit watch timer as aclock source, a control register, and a watchdog reset controller.
The timebase timer consists of an 18-bit timer and a circuit that controls interval interrupts. Note that the timebase
timer uses the main clock, regardless of the setting of the MCS bit and SCS bit in CKSCR.
The watch timer consists of a 15-bit timer and a circuit that controls interval interrupts. Note that the watch timer
uses the sub clock, regardless of the setting of the MCS bit SCS bit in CKSCR.
Watchdog timer control register (WDTC)
Timebase timer control register (TBTC)
Watch timer control register (WTC)
Address : 0000AA
R/W
Address : 0000A8
Address : 0000A9
W
—
R
X
: Readable and writable
: Read only
: Write only
: Unused
: Indeterminate
H
H
H
Reserved
bit 15
WDCS SCE
PONR
—
bit 7
bit 7
R/W
R
bit 14
—
—
bit 6
bit 6
—
—
R
bit 13
—
—
WRST ERST SRST
WTIE WTOF WTR WTC2 WTC1 WTC0
bit 5
bit 5
R/W
R
bit 12
TBIE
R/W
R/W
bit 4
bit 4
R
TBOF
bit 11
R/W
bit 3
bit 3
MB90650A Series
R
R
bit 10
TBR
W
WTE
bit 2
bit 2
R/W
W
TBC1 TBC0
R/W
bit 9
WT1
bit 1
bit 1
R/W
W
R/W
bit 8
WT0
bit 0
bit 0
R/W
W
1 X 0 0 0 0 0 0
XXXXX111
1 - - 0 0 0 0 0
Initial value
Initial value
Initial value
B
B
B
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