MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 225
MC68HC908AS60ACFN
Manufacturer Part Number
MC68HC908AS60ACFN
Description
M68HC08 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC908AS60ACFN.pdf
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19.13.3 SPI Data Register
The SPI data register is the read/write buffer for the receive data register and the 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
buffers that can contain different values. (See
R7–R0/T7–T0 — Receive/Transmit Data Bits
Freescale Semiconductor
Address:
Do not use read-modify-write instructions on the SPI data register since the
buffer read is not the same as the buffer written.
Reset:
Read:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
$0012
Bit 7
R7
T7
Figure 19-14. SPI Data Register (SPDR)
R6
T6
6
R5
T5
5
Figure
Indeterminate after Reset
NOTE
R4
T4
4
19-2.)
R3
T3
3
R2
T2
2
R1
T1
1
Bit 0
R0
T0
I/O Registers
225
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