mc68hc912bd32 Freescale Semiconductor, Inc, mc68hc912bd32 Datasheet - Page 162
mc68hc912bd32
Manufacturer Part Number
mc68hc912bd32
Description
16-bit Device Composed Of Standard On-chip Peripherals
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912BD32.pdf
(292 pages)
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SS Output
Serial Interface
MC68HC912BD32 Rev 1.0
SCK (CPOL=0)
SCK (CPOL=1)
SAMPLE I
(MOSI/MISO)
CHANGE O
CHANGE O
SEL SS (O)
(Master only)
SEL SS (I)
(MOSI pin)
(MISO pin)
MSB first (LSBF=0):
LSB first (LSBF=1):
Transfer
t
L
Available in master mode only, SS output is enabled with the SSOE bit
in the SP0CR1 register if the corresponding DDRS bit is set. The SS
output pin will be connected to the SS input pin of the external slave
device. The SS output automatically goes low for each transmission to
select the external device and it goes high during each idling state to
deselect external devices.
Figure 23 SPI Clock Format 1 (CPHA = 1)
MSB
LSB
Freescale Semiconductor, Inc.
For More Information On This Product,
DDS7
Begin
Bit 6
Bit 1
0
0
1
1
Go to: www.freescale.com
Bit 5
Bit 2
SSOE
Serial Interface
0
1
0
1
Table 31 SS Output Selection
Bit 4
Bit 3
SS Input with MODF Feature
General-Purpose Output
Bit 3
Bit 4
Master Mode
SS Output
Reserved
Bit 2
Bit 5
Bit 1
Bit 6
End
MSB
LSB
t
T
Minimum 1/2 SCK
Slave Mode
t
SS Input
SS Input
SS Input
SS Input
I
for t
T
t
, t
L
l
, t
L
16-sint
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