MC68HC08GZ32 Datasheet, PDF (219/320 Pages) Freescale Semiconductor, Inc – Microcontrollers

INTERNAL BUS
Functional Description
TRANSMIT DATA REGISTER
BUSCLK
÷2
CLOCK ^{÷ 8}
DIVIDER _{÷ 32}
÷ 128
SHIFT REGISTER
76543210
RECEIVE DATA REGISTER
SPMSTR SPE
CLOCK
SELECT
SPR1 SPR0
CLOCK
LOGIC
PIN
CONTROL
LOGIC
M
S
SPMSTR CPHA CPOL
MISO
MOSI
SPSCK
SS
TRANSMITTER CPU INTERRUPT REQUEST
RECEIVER/ERROR CPU INTERRUPT REQUEST
SPI
CONTROL
MODFEN
ERRIE
SPTIE
SPRIE
SPE
SPWOM
SPRF
SPTE
OVRF
MODF
Figure 16-2. SPI Module Block Diagram
Addr.
$0010
$0011
$0012
Register Name
Bit 7
6
5
4
3
2
SPI Control Register ^Read:
(SPCR) Write:
See page 232. _Reset:
SPRIE
0
R
SPMSTR CPOL CPHA SPWOM
0
1
0
1
0
SPI Status and Control ^Read:
Register (SPSCR) Write:
See page 233. _Reset:
SPRF
0
ERRIE
0
OVRF
0
MODF
0
SPTE
1
MODFEN
0
SPI Data Register ^{Read: R7}
R6
R5
R4
R3
R2
(SPDR) Write: T7
T6
T5
T4
T3
T2
See page 235. _Reset:
Unaffected by reset
R = Reserved
= Unimplemented
Figure 16-3. SPI I/O Register Summary
1
SPE
0
SPR1
0
R1
T1
Bit 0
SPTIE
0
SPR0
0
R0
T0
MC68HC08GZ32 Data Sheet, Rev. 3
Freescale Semiconductor
219