AMD Geode™ SC1200/SC1201 Processor Data Book
99
SuperI/O Module
32579B
Table 5-7. RTC Configuration Registers
Bit
Description
Index F0h
RAM Lock Register - RLR (R/W)
When any non-reserved bit in this register is set to 1, it can be cleared only by hardware reset.
7
Block Standard RAM.
0: No effect on Standard RAM access. (Default)
1: Read and write to locations 38h-3Fh of the Standard RAM are blocked, writes ignored, and reads return FFh.
6
Block RAM Write.
0: No effect on RAM access. (Default)
1: Writes to RAM (Standard and Extended) are ignored.
5
Block Extended RAM Write.
This bit controls writes to bytes 00h-1Fh of the Extended RAM.
0: No effect on the Extended RAM access. (Default)
1: Writes to bytes 00h-1Fh of the Extended RAM are ignored.
4
Block Extended RAM Read.
This bit controls read from bytes 00h-1Fh of the Extended RAM.
0: No effect on Extended RAM access. (Default)
1: Reads to bytes 00h-1Fh of the Extended RAM are ignored.
3
Block Extended RAM.
This bit controls access to the Extended RAM 128 bytes.
0: No effect on Extended RAM access. (Default)
1: Read and write to the Extended RAM are blocked: writes are ignored and reads return FFh.
2:0
Reserved.
Index F1h
Date Of Month Alarm Register Offset Register - DOMAO (R/W)
7
Reserved.
6:0
Date of Month Alarm Register Offset Value.
Index F2h
Month Alarm Register Offset Register - MANAO (R/W)
7
Reserved.
6:0
Month Alarm Register Offset Value.
Index F3h
Century Register Offset Register - CENO (R/W)
7
Reserved.
6:0
Century Register Offset Value.
Summary of Contents for Geode SC1200
Page 8: ...8 AMD Geode SC1200 SC1201 Processor Data Book List of Figures 32579B...
Page 16: ...16 AMD Geode SC1200 SC1201 Processor Data Book Overview 32579B...
Page 24: ...24 AMD Geode SC1200 SC1201 Processor Data Book Architecture Overview 32579B...
Page 364: ...364 AMD Geode SC1200 SC1201 Processor Data Book Debugging and Monitoring 32579B...