mb90f377pff-g Fujitsu Microelectronics, Inc., mb90f377pff-g Datasheet - Page 56

• Manufacturer Part Number: mb90f377pff-g
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

56
MB90370/375 Series
5. Watch timer
(1) Register configuration of watch timer
(2) Block diagram of watch timer
Watch Timer Control Register
The watch timer is a 15-bit timer that uses sub-clocks and can generate an interval interrupt. It can also be used
as the watchdog timer clock source and sub-clock oscillation wait time.
Features of the watch timer :
• Provides the watchdog timer clock source
• Sub-clock oscillation stabilization wait timer function
• Interval timer function that generates interrupts in a given cycle
Address : 0000AA
The subclock
divided by 4
Initial value
Read/write
WDCS
H
SCE
WDCS
R/W
7
1
Watch timer control register (WTC)
2
Watch counter
10
WTIE
SCE
2
R
6
0
13
WTOF
2
WTIE
R/W
14
5
0
Clear
WTR
2
15
WTOF
R/W
2
2
2
2
2
2
2
2
4
0
8
10
11
12
13
14
15
9
WTC2
WTR
W
3
1
Interval selector
WTC1
WTC2
R/W
2
0
WTC0
WTC1
R/W
1
0
WTC0
R/W
0
0
Bit number
WTC
To the
watchdog
timer
Watch
timer
interrupt