SC16IS750IPW NXP [NXP Semiconductors], SC16IS750IPW Datasheet - Page 43

• Manufacturer Part Number: SC16IS750IPW
• Description: Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
• Manufacturer: NXP [NXP Semiconductors]

Fig 24. SPI operation
SCLK
SCLK
SCLK
SCLK
SO
SO
(1) Last bit (D0) of the last byte to be written to the transmit FIFO.
(2) Last bit (D0) of the last byte to be read from the receive FIFO.
a. Register write
d. FIFO read cycle
b. Register read
c. FIFO write cycle
SI
SI
SI
SI
R/W = 0; A[3:0] = register address; CH1 = 0, CH0 = 0
R/W = 1; A[3:0] = register address; CH1 = 0, CH0 = 0
R/W = 0; A[3:0] = 0000; CH1 = 0, CH0 = 0
R/W = 1; A[3:0] = 0000; CH1 = 0, CH0 = 0
R/W
R/W
R/W
R/W
A3
A3
A3
A3
A2
A2
A2
A2
A1
A1
A1
A1
A0
A0
A0
A0
CH1
CH1
CH1
CH1
CH0
CH0
CH0
CH0
X
X
X
X
D7
D7
D7
D7
D6
D6
D6
D6
D5
D5
D5
D5
D4
D4
D4
D4
D3
D3
D3
D3
D2
D2
D2
D2
D1
D1
D1
D1
D0
D0
D0
D0
D7
D7
D6
D6
D5
D5
D4
D4
D3
D3
D2
D2
D1
D1
D0
D0
last bit
last bit
(1)
(2)
002aab433
002aab434
002aab435
002aab436