DS3234
Extremely Accurate SPI Bus RTC
with Integrated Crystal and SRAM
Maxim Integrated | 6
www.maximintegrated.com
Timing Diagram—SPI Read Transfer
HIGH IMPEDANCE
CS
SCLK
DIN
W/R
t
DC
t
CL
t
CH
t
CDD
t
CDZ
t
CDH
t
CC
t
CCS
t
R
t
F
A6
A0
D0
WRITE ADDRESS BYTE
NOTE:
SCLK CAN BE EITHER POLARITY, SHOWN FOR CPOL = 1.
READ DATA BYTE
DOUT
D7
Timing Diagram—SPI Write Transfer
CS
SCLK
DIN
W/R
t
DC
t
CDH
t
CL
t
CH
t
CCH
t
CWH
t
F
t
R
t
CC
A6
A0
WRITE ADDRESS BYTE
WRITE DATA BYTE
D7
D0
DOUT
HIGH IMPEDANCE