CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 439

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Real-Time Clock Register Descriptions
6.15.1
6.15.1.1 RTC RAM Lock (RTC_RAM_LOCK)
MSR Address
Type
Reset Value
When a non-reserved bit is set to 1, it can only be cleared by hardware reset.
AMD Geode™ CS5535 Companion Device Data Book
BLK_STDRAM BLK_RAM_WR BLK_XRAM_WR BLK_XRAM_RD
Bit
2:0
7
6
5
4
3
7
RTC Specific MSRs
Name
BLK_STDRAM
BLK_RAM_WR
BLK_XRAM_WR
BLK_XRAM_RD
BLK_XRAM
RSVD
51400054h
R/W
00h
6
Description
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
Block RAM Write.
0: No effect on RAM access (default).
1: Write to RAM (Standard and Extended) are ignored.
Block Extended RAM Write. This bit controls write to bytes 00h-1Fh of the Extended
RAM.
0: No effect on Extended RAM access (default).
1: Writes to byte 00h-1Fh of the Extended RAM are ignored.
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 from byte 00h-1Fh of the Extended RAM are ignored.
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
Reserved. Write as 0.
ignored, and reads return FFh.
return FFh.
5
RTC_RAM_LOCK Bit Descriptions
RTC_RAM_LOCK Register Map
4
BLK_XRAM
3
2
31506B
RSVD
1
0
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