Rainbow Electronics DS1393 - Manual (Page 20)

DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
20 ____________________________________________________________________
CS
SCLK
DIN
DOUT HIGH-IMPEDANCE
ADDRESS
BYTE
ADDRESS
BYTE
DATA BYTE 0 DATA BYTE 1
DIN
DATA BYTE N
DATA
BYTE 0
DATA
BYTE 1
DATA
BYTE N
WRITE
READ
Figure 13. SPI Multiple-Byte Burst Transfer
A1 A2 A3 A4 A5 A6
CE
SCLK
I/O
W/R A0 D1 D2 D3 D4 D5 D6 D7 D0
Figure 14. 3-Wire Single-Byte Read
A1 A2 A3 A4 A5 A6
CE
SCLK
I/O
W/R A0 D1 D2 D3 D4 D5 D6 D7 D0
Figure 15. 3-Wire Single-Byte Write