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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
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...