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Bus Controller (BC)
8-23
~
~
8.6.6 Refresh count register
Register symbol: REFCNT
Address:
x'32000042
Purpose:
Sets the DRAM refresh interval when DRAM is connected.
Bit No.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit
REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC REFC
name
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit No.
Bit name
Description
Setting conditions
15 to 0
REFC 15 to 0
DRAM refresh interval
x'0000:
1 SYSCLK
x'FFFF:
65536 SYSCLK
The refresh interval is the (REFCNT s1) multiplied by the SYSCLK cycle.
For the DRAM refresh timing, refer to section 8.14.4, “DRAM Refresh.”
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 ...