MC9S08AW32CFGE Freescale, MC9S08AW32CFGE Datasheet - Page 211
MC9S08AW32CFGE
Manufacturer Part Number
MC9S08AW32CFGE
Description
Manufacturer
Freescale
Datasheet
1.MC9S08AW32CFGE.pdf
(324 pages)
Specifications of MC9S08AW32CFGE
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
2KB
# I/os (max)
34
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
32KB
Lead Free Status / RoHS Status
Compliant
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pin from a master and the MISO waveform applies to the MISO output from a slave. The SS OUT
waveform applies to the slave select output from a master (provided MODFEN and SSOE = 1). The master
SS output goes to active low one-half SPSCK cycle before the start of the transfer and goes back high at
the end of the eighth bit time of the transfer. The SS IN waveform applies to the slave select input of a
slave.
When CPHA = 1, the slave begins to drive its MISO output when SS goes to active low, but the data is not
defined until the first SPSCK edge. The first SPSCK edge shifts the first bit of data from the shifter onto
the MOSI output of the master and the MISO output of the slave. The next SPSCK edge causes both the
master and the slave to sample the data bit values on their MISO and MOSI inputs, respectively. At the
third SPSCK edge, the SPI shifter shifts one bit position which shifts in the bit value that was just sampled,
and shifts the second data bit value out the other end of the shifter to the MOSI and MISO outputs of the
master and slave, respectively. When CHPA = 1, the slave’s SS input is not required to go to its inactive
high level between transfers.
Figure 12-11
shown for reference with bit 1 starting as the slave is selected (SS IN goes low), and bit 8 ends at the last
SPSCK edge. The MSB first and LSB first lines show the order of SPI data bits depending on the setting
Freescale Semiconductor
(MISO OR MOSI)
(MASTER OUT)
(REFERENCE)
(SLAVE OUT)
SAMPLE IN
MSB FIRST
BIT TIME #
(CPOL = 0)
(CPOL = 1)
LSB FIRST
(MASTER)
(SLAVE)
SS OUT
SPSCK
SPSCK
SS IN
MOSI
MISO
shows the clock formats when CPHA = 0. At the top of the figure, the eight bit times are
Figure 12-10. SPI Clock Formats (CPHA = 1)
BIT 7
BIT 0
1
MC9S08AW60 Data Sheet, Rev 2
BIT 6
BIT 1
2
...
...
...
BIT 2
BIT 5
Chapter 12 Serial Peripheral Interface (S08SPIV3)
6
BIT 1
BIT 6
7
BIT 0
BIT 7
8
211
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