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Processor PCB
2-44
2.9.2
Programming Considerations
Input and output of clock/calendar data is available on command as a 40-bit serial
word having the following format.
MSB
LSB
4 bits
4 bits
8 bits
8 bits
8 bits
8 bits
month
day of wk.
date
hour
minute
second
The writelread instruction format is shown in Table 2-12 and Figure 2-28.
Table 2-12 Clock/Calendar Instruction Format
READ/
I/O
DATA BUS
DESCRIPTION
INSTRUCTION
WRITE
ADDRESS
7
6
5
4
3
2
;
0
D
C
S
Set Register
W
58
0
0
L
T
C2 CI CO
See Figure
I
K
B
2-28(1)
B
Read Data
R
58
A
D
See Figure
-
-
-
-
-
-
T
0
2-28 (2)
T
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