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Watchdog Timer
12-5
Watchdog timer control register
Register symbol: WDCTR
Address:
x'34004008
Purpose:
This register sets the watchdog timer operation control conditions.
Bit No.
7
6
5
4
3
2
1
0
Bit
WD
WD
WD
WD
-
WD
WD
WD
name
CNE RST
OVT OVF
CK2
CK1
CK0
Reset
0
0
0
0
0
0
0
1
Access
R/W
R/W
R/W
R
R
R/W
R/W
R/W
Bit No.
Bit name
Description
0
WDCK0
Clock source selection (LSB)
1
WDCK1
Clock source selection
2
WDCK2
Clock source selection (MSB)
These bits select the clock source for the high-order 8 bits of the counter.
When the reset state is released, the clock source corresponding to "001"
below is selected.
When CKSEL is "H"
When CKSEL is "L"
000:
1/2
8
of the OSCI input
1/2
9
001:
1/2
10
of the OSCI input
1/2
11
010:
1/2
12
of the OSCI input
1/2
13
011:
1/2
14
of the OSCI input
1/2
15
100:
1/2
16
of the OSCI input
1/2
17
101:
Setting prohibited
110:
Setting prohibited
111:
Setting prohibited
Overflow cycle = 2
(n + WDCK x 2)
/(f x 10
3
) [ms]
Where, n = 16 (CKSEL pin is “H”) or n = 17 (CKSEL pin is “L”);
WDCK = WDCK[2:0]; f: Oscillation input frequency [unit: MHz]
Example
Selection
Overflow cycle
When CKSEL is "H" and oscillating frequency is 15 MHz
000
4.369 ms
001
17.476 ms
010
69.905 ms
011
279.620 ms
100
1118.481 ms
Содержание MN103001G/F01K
Страница 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Страница 2: ......
Страница 4: ......
Страница 6: ......
Страница 7: ...14 A D Converter 15 I O Ports 16 Internal Flash Memory 17 Ordering Mask ROM Appendix 14 15 16 17 ...
Страница 8: ......
Страница 9: ...Table of Contents List of Figures and Tables 0 ...
Страница 26: ...xviii ...
Страница 27: ...1 0 1 General Specifications ...
Страница 35: ...2 CPU 2 ...
Страница 57: ...3 Extension Instruction Specifications 3 ...
Страница 96: ...Extension Instruction Specifications 3 40 ...
Страница 97: ...4 Memory Modes 3 4 ...
Страница 102: ...Memory Modes 4 6 ...
Страница 103: ...5 Operating Mode 5 ...
Страница 107: ...6 Clock Generator 6 13 ...
Страница 111: ...7 Internal Memory 7 ...
Страница 114: ...Internal Memory 7 4 ...
Страница 115: ...8 Bus Controller BC 8 ...
Страница 189: ...9 Interrupt Controller 9 ...
Страница 220: ...Interrupt Controller 9 32 ...
Страница 221: ...10 8 bit Timers 9 10 ...
Страница 254: ...8 bit Timers 10 34 ...
Страница 255: ...11 16 bit Timers 11 ...
Страница 292: ...16 bit Timers 11 38 ...
Страница 293: ...12 Watchdog Timer 11 12 ...
Страница 302: ...Watchdog Timer 12 10 ...
Страница 303: ...13 Serial Interface 13 ...
Страница 354: ...Serial Interface 13 52 ...
Страница 355: ...14 A D Converter 14 ...
Страница 367: ...15 I O Ports 15 ...
Страница 431: ...16 Internal Flash Memory 16 ...
Страница 439: ...17 17 Ordering Mask ROM ...
Страница 442: ...Ordering Mask ROM 17 4 ...
Страница 443: ...Appendix ...