MC68HC708MP16CFU

Manufacturer Part NumberMC68HC708MP16CFU
ManufacturerFreescale Semiconductor, Inc
MC68HC708MP16CFU datasheet
 


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Page 255/398:

Master Mode

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Addr.
Name
SPI Control Register
$001B
(SPCR)
SPI Status and Control
$001C
Register (SPSCR)
SPI Data Register
$001D
(SPDR)
The SPI module allows full-duplex, synchronous, serial communication
between the MCU and peripheral devices, including other MCUs.
Software can poll the SPI status flags or SPI operation can be interrupt-
driven. All SPI interrupts can be serviced by the CPU.
The following paragraphs describe the operation of the SPI module.
13.5.1 Master Mode
The SPI operates in master mode when the SPI master bit, SPMSTR, is
set.
NOTE:
Configure the SPI modules as master or slave before enabling them.
Enable the master SPI before enabling the slave SPI. Disable the slave
SPI before disabling the master SPI. (See
Register.)
MC68HC708MP16
Rev. 3.1
Freescale Semiconductor
Bit 7
6
5
Read:
DMAS
SPRIE
SPMSTR
Write:
Reset:
0
0
1
Read: SPRF
OVRF
ERRIE
Write:
Reset:
0
0
0
Read:
R7
R6
R5
Write:
T7
T6
T5
Reset:
= Unimplemented
Figure 13-2. SPI I/O Register Summary
Serial Peripheral Interface Module (SPI)
Serial Peripheral Interface Module (SPI)
4
3
2
CPOL
CPHA
SPWOM
0
1
0
MODF
SPTE
MODFEN
SPR1
0
1
0
R4
R3
R2
T4
T3
T2
Indeterminate after reset
13.14.1 SPI Control
Technical Data
1
Bit 0
SPE
SPTIE
0
0
SPR0
0
0
R1
R0
T1
T0
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