MC908GZ60CFUE Datasheet, PDF (241/352 Pages) Freescale Semiconductor, Inc – Standard features, Features of the CPU08

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
SPI Control Register ^Read:
(SPCR) Write:
See page 255. _Reset:
SPI Status and Control ^Read:
Register (SPSCR) Write:
See page 256. _Reset:
SPI Data Register ^Read:
(SPDR) Write:
See page 258. _Reset:
Bit 7
SPRIE
0
SPRF
0
R7
T7
R
6
R
0
ERRIE
0
R6
T6
5
SPMSTR
1
OVRF
0
R5
T5
= Reserved
4
3
2
CPOL CPHA SPWOM
0
MODF
1
SPTE
0
MODFEN
0
1
0
R4
R3
R2
T4
T3
T2
Unaffected by reset
= Unimplemented
Figure 16-3. SPI I/O Register Summary
1
SPE
0
SPR1
0
R1
T1
Bit 0
SPTIE
0
SPR0
0
R0
T0
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
Freescale Semiconductor
241