MC68HC908AB32CFU Freescale Semiconductor, MC68HC908AB32CFU Datasheet - Page 287
MC68HC908AB32CFU
Manufacturer Part Number
MC68HC908AB32CFU
Description
IC MCU 8MHZ 32K FLASH 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AB32CFUE.pdf
(392 pages)
Specifications of MC68HC908AB32CFU
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
POR, PWM
Number Of I /o
51
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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MC68HC908AB32
Freescale Semiconductor
CAPTURE STROBE
FOR REFERENCE
SPSCK; CPOL = 0
MASTER SS
SPSCK; CPOL =1
SPSCK CYCLE #
MISO/MOSI
FROM MASTER
SS; TO SLAVE
SLAVE SS
SLAVE SS
CPHA = 0
CPHA = 1
FROM SLAVE
—
Rev. 1.1
MOSI
MISO
Figure 16-4. Transmission Format (CPHA = 0)
When CPHA = 0 for a slave, the falling edge of SS indicates the
beginning of the transmission. This causes the SPI to leave its idle state
and begin driving the MISO pin with the MSB of its data. Once the
transmission begins, no new data is allowed into the shift register from
the transmit data register. Therefore, the SPI data register of the slave
must be loaded with transmit data before the falling edge of SS. Any data
written after the falling edge is stored in the transmit data register and
transferred to the shift register after the current transmission.
Serial Peripheral Interface Module (SPI)
MSB
Figure 16-5. CPHA/SS Timing
BYTE 1
MSB
1
BIT 6
BIT 6
2
BIT 5
BIT 5
3
BYTE 2
BIT 4
BIT 4
4
BIT 3
BIT 3
5
Serial Peripheral Interface Module (SPI)
BIT 2
BIT 2
6
BYTE 3
BIT 1
BIT 1
7
LSB
LSB
8
Technical Data
287
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