Table 65B shows Bank 1, the second bank of
CMOS registers which contains an additional
128 bytes of general purpose CMOS registers.
All 128 bytes are directly writeable and readable
by the host.
Table 65B - Real Time Clock Address Map, Bank 1
ADDRESS
REGISTER TYPE
REGISTER FUNCTION
0-7F
R/W
Register 0-7F: General Purpose
Table 65C shows the address map of Bank 2,
the third bank of CMOS registers, which contain
the registers for the century byte and the second
alarm function.
All 9 bytes are directly writeable and readable by
the host.
Table 65C - Real Time Clock Address Map, Bank 2
ADDRESS
REGISTER TYPE
REGISTER FUNCTION
Register 0: Century Byte
40
41
42
43
44
45
46
47
48
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register 1: Seconds Alarm 2
Register 2: Minutes Alarm 2
Register 3: Hours Alarm 2
Register 4: Day of Week Alarm 2
Register 5: Date of Month Alarm 2
Register 6: Month Alarm 2
Register 7: Year Alarm 2
Register 8: Control Register 1
Note: One or two of the three banks of CMOS
Registers are selected via the RTC Mode
Register (Logical Device 6, 0xF0). Banks 1
and 2 are also relocatable via the RTC Mode
Register and the Secondary Base Address
(CR62 and CR63). See Configuration Section.
148
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