DS1343_1112 Datasheet, PDF (17/20 Pages) Maxim Integrated Products – Low-Current SPI/3-Wire RTCs

Low-Current SPI/3-Wire RTCs
CE
SCLK*
SDI
1 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
R/W
SDO
HIGH-Z
*SCLK CAN BE EITHER POLARITY.
SERMODE = V_CC.
Figure 4. SPI Single-Byte Write
CE
SCLK*
SDI
0
A6 A5 A4 A3 A2 A1 A0
R/W
HIGH-Z
SDO
D7 D6 D5 D4 D3 D2 D1
D0
*SCLK CAN BE EITHER POLARITY.
SERMODE = V_CC.
Figure 5. SPI Single-Byte Read
CE
SCLK
WRITE
SDI
SDI
READ
SDO
ADDRESS
BYTE
ADDRESS
BYTE
DATA
BYTE 0
DATA
BYTE 0
DATA
BYTE 1
DATA
BYTE 1
DATA
BYTE N
DATA
BYTE N
Figure 6. SPI Multibyte Burst Transfer
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