DS1390_09 Datasheet, PDF (5/26 Pages) Maxim Integrated Products – Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
CPHA = 1
CS
SCLK
tCC
tR
tF
tCL
tCDH
tCH
tDC
DIN
W/R
A6
A0
DOUT
WRITE ADDRESS BYTE
NOTE: SCLK CAN BE EITHER POLARITY SHOWN FOR CPOL = 1.
Figure 2a. Timing Diagram—SPI Write Transfer (Mode 3)
HIGH IMPEDANCE
tCWH
tCCH
D7
D0
READ DATA BYTE
CPHA = 0
CS
tCC
tR
SCLK
tCL
tCH
tCDH
tDC
DIN
W/R
A6
tF
A0
DOUT
WRITE ADDRESS BYTE
NOTE: SCLK CAN BE EITHER POLARITY SHOWN FOR CPOL = 0.
Figure 2b. Timing Diagram—SPI Write Transfer (Mode 0)
HIGH IMPEDANCE
tCWH
tCCH
D7
D0
READ DATA BYTE
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