PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 64

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

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4.7 REGISTER BANK TABLES
0Eh-3Fh General Purpose
Index
0Ah
0Bh
0Ch
0Dh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
Register
Seconds
Seconds Alarm
Minutes
Minutes Alarm
Hours
Hours Alarm
Day of Week
Date of Month
Month
Year
Control Register A
Control Register B
Control Register C
Control Register D
RAM
Function
Real-Time Clock (RTC) and Advanced Power Control (APC) (Logical Device 2)
TABLE 4-7. Bank 0 Registers, General Purpose Memory Bank
TABLE 4-6. Banks 1 and 2, Common 64-Byte Memory Map
40h - 7Fh
00h-3Fh
Index
12 hr = 01-12 (AM)
12 hr = 81-92 (PM)
12 hr = 01-12 (AM)
12 hr = 81-92 (PM)
24 hr = 00-23
24 hr = 00-23
BCD Format
00-59
00-59
00-59
00-59
01-07
01-31
01-12
00-99
Type Power-on Value
R/W
64
01-07 (Sunday = 1)
Binary Format
01-0c (AM)
81-8c (PM)
01-0c (AM)
81-8c (PM)
The first 14 RTC registers and the first 50 RTC
RAM bytes are shared among banks 0, 1 and 2.
General Purpose 64-Byte Battery-Backed RAM.
00-3b
00-3b
00-3b
00-3b
00-17
00-17
00-63
01-0c
01-1f
Function
R/W (bit 7 is read only)
R/W (bit 3 is read only)
All bits read only
All bits read only
Comments
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