Rainbow Electronics DS1393 - Manual (Page 4)

DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
4 _____________________________________________________________________
CS
SCLK
DIN
W/R
t DC
t CL t CH
t CDD
t CDZ
t CDH
t CC 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
Figure 1. Timing Diagram—SPI Read 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
Figure 2. Timing Diagram—SPI Write Transfer