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COMMAND SUMMARY
(I)
SET REGISTER
6
5
4
3
2
0
_BIT:"il'VlBER
r--r-""""T'""""'T--'---'-,
-r, --.,--.,
DON'T CARE
('2 CI Co
o
0
0
REGISTER HOLD COMMAND
o
0
REGISTER SHIFT COMMAND
o
TIME SET/COliNTER HOLD COMMAND
TIME READ COMMAND
I
0
0
ILLEGAL
o
I
ILLEGAL
I
0
ILLEGAL
I
I
ILU:(;AL
L -_ _ _ _ _
STROBE
COMMANDS «('2, CI, CO) ARE INDEPENDENTLY LATCHED BY
TIlE STB INPUT
' - - - - - - - - CLOCK
DATA INPUT/OUTPUT IN SYNCHRONIZATION WITH CLK INPUT
' - - - - - - - - - - D A T A INPUT
(2)
READ DATA
DATA OUTPLT
' - - - - BATTERY VOLTM;E CIIECK
0= NORMAL (ELECTRO-CHEM>3,OV, SANYO>2..W)
I
=
LOW
(ELECTRO-CIlEM~3.0V, SANYO~2.3V)
Figure 2-28 Clock/Calendar Format
Processor PCB
2-45
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