mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 215

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

16.13.3 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
Freescale Semiconductor
Address: $0012
Do not use read-modify-write instructions on the SPI data register since the
register read is not the same as the register written.
Reset:
Read:
Write:
Bit 7
R7
T7
Figure 16-16. SPI Data Register (SPDR)
R6
T6
6
MC68HC908GR16 Data Sheet, Rev. 5.0
R5
T5
5
NOTE
Unaffected by reset
R4
T4
4
Figure
R3
T3
3
16-3.
R2
T2
2
R1
T1
1
Bit 0
R0
T0
I/O Registers
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