Specifications

PC/II+p Board Technical Reference Manual 62
MT002615 ©1999-2001, Megatel Computer Corporation
7.21.5 Real-Time Clock – Memory Map
Table 30 Real-Time Clock Memory Map
RTC Bank 0 Bank 1
Offset Description Access Description Access
00
Seconds R(bits 0-7),
W(bits 0-6)
Seconds R(bits 0-7),
W(bits 0-6)
01
Seconds Alarm RW Seconds Alarm RW
02
Minutes RW Minutes RW
03
Minutes Alarm RW Minutes Alarm RW
04
Hours RW Hours RW
05
Hours Alarm RW Hours Alarm RW
06
Day of the Week RW Day of the Week RW
07
Day of the Month RW Day of the Month RW
08
Month RW Month RW
09
Year RW Year RW
0A
Register A R(bits 0-7),
W(bits 0-6)
Register A R(bits 0-7),
W(bits 0-6)
0B
Register B RW Register B RW
0C
Register C R Register C R
0D
Register D R Register D R
0E-3F
RAM Bytes 00-3F RAM Bytes 00-3F
40
RAM Byte 40 RTC Model Number
41
RAM Byte 41 1st Byte Serial Number
42
RAM Byte 42 2nd Byte Serial Number
43
RAM Byte 43 3rd Byte Serial Number
44
RAM Byte 44 4th Byte Serial Number
45
RAM Byte 45 5th Byte Serial Number
46
RAM Byte 46 6th Byte Serial Number
47
RAM Byte 47 CRC Byte
48
RAM Byte 48 Century Byte
49
RAM Byte 49 Date Alarm
4A
RAM Byte 4A Extended Control Reg 4A
4B
RAM Byte 4B Extended Control Reg 4B
4C
RAM Byte 4C Reserved
4D
RAM Byte 4D Reserved
4E
RAM Byte 4E RTC Address - 2