MC68HC705 MOTOROLA [Motorola, Inc], MC68HC705 Datasheet - Page 147

• Manufacturer Part Number: MC68HC705
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

11.9.1 SPI Data Register
11.9.2 SPI Control Register
MC68HC705C8A — Rev. 2.0
MOTOROLA
Address:
Address:
The SPDR shown in
received by the SPI. Writing a byte to the SPDR places the byte directly
into the SPI shift register.
SPIE — SPI Interrupt Enable Bit
Reset:
Reset:
Read:
Read:
Write:
Write:
•
•
•
•
This read/write bit enables SPI interrupts. Reset clears the SPIE bit.
1 = SPI interrupts enabled
0 = SPI interrupts disabled
Enables SPI interrupt requests
Enables the SPI
Configures the SPI as master or slave
Selects serial clock polarity, phase, and frequency
$000C
$000A
SPIE
Bit 7
Bit 7
Bit 7
0
Serial Peripheral Interface (SPI)
Figure 11-8. SPI Control Register (SPCR)
Figure 11-7. SPI Data Register (SPDR)
= Unimplemented
Bit 6
SPE
6
6
0
Figure 11-7
Bit 5
5
5
Unaffected by reset
MSTR
Bit 4
is the read buffer for characters
4
4
0
U = Unaffected
CPOL
Bit 3
U
3
3
Serial Peripheral Interface (SPI)
CPHA
Bit 2
U
2
2
SPI I/O Registers
SPR1
Bit 1
U
1
1
Technical Data
SPR0
Bit 0
Bit 0
Bit 0
U
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