SPFD54124B Drise, SPFD54124B Datasheet - Page 119

• Manufacturer Part Number: SPFD54124B
• Description: 396-Channel 6-Bit Source Driver
• Manufacturer: Drise

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7.2.4.2.2 Read Functions
The read mode of the interface means that the micro controller reads register value from the Driver. To do the micro controller first has to
send a command (Read ID or register command) and then the following byte is transmitted in the opposite direction. After the read status
command has been sent, the SDA lin must be set to tri-state no later than at the falling edge of SCL of the last bit.
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4-pins Serial Protocol (for RDID1/ RDID2/ RDID3/ 0AH/ 0BH/ 0CH/ 0DH/ 0EH/ 0FH command: 8-bits read)
4-pins Serial Protocol (for RDDST command: 32-bits read)
4-pins Serial Protocol (for RDDID command: 24-bits read)
(MCU to
(MCU to
(MCU to
Driver)
Driver)
Driver)
Host
Host
Host
(SDO)
(SDO)
(SDO)
(SDI)
(SDI)
D/CX
(SDI)
D/CX
SDA
SDA
D/CX
SDA
SDA
CSX
SDA
SDA
CSX
SCL
CSX
SCL
SCL
S
S
S
D7
D7
D7
D6
D6
D6
D5
D5
D5
Hight-Z
Hight-Z
Hight-Z
D4
D4
D4
Fig. 7.2.4.2.2 4-pins Serial interface Read protocol
TB
TB
TB
D3
D3
D3
D2
D2
D2
D1
D1
D1
D0
D0
D0
0
0
0
D7
D31 D30 D29
D23 D22 D21
D6
119
Dummy Clock Cycle = 8 clock
Dummy Clock Cycle = 8 clock
D5
D4
Hight-Z
Hight-Z
Hight-Z
TB
D28
D3
TB
TB
D27 D26
D2
D1
D0
D2
D1
P
D0
S
D2
P
D7
SPFD54124B
D1
S
Preliminary
D0
D7
Preliminary Version: 0.6
P
S
APR. 26, 2007
D7