s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 188

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Peripheral Interface (SPI) Module
15.8.3 SPI Data Register
The SPI data register consists of the read-only receive data register and the write-only transmit data
register. Writing to the SPI data register writes data into the transmit data register. Reading the SPI data
register reads data from the receive data register. The transmit data and receive data registers are
separate registers that can contain different values. See
R7–R0/T7–T0 — Receive/Transmit Data Bits
188
Reset:
Read:
Write:
Do not use read-modify-write instructions on the SPI data register because
the register read is not the same as the register written.
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
Bit 7
R7
T7
Figure 15-15. SPI Data Register (SPDR)
R6
T6
6
R5
T5
5
Unaffected by reset
NOTE
R4
T4
4
Figure
R3
T3
3
15-2.
R2
T2
2
R1
T1
1
Freescale Semiconductor
Bit 0
R0
T0