MC908GR60AVFAE Freescale Semiconductor, MC908GR60AVFAE Datasheet - Page 206
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MC908GR60AVFAE
Manufacturer Part Number
MC908GR60AVFAE
Description
IC MCU 8BIT 60K FLASH 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908GR32ACFJE.pdf
(314 pages)
Specifications of MC908GR60AVFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
37
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 24x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
MC908GR60AVFAE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Serial Peripheral Interface (SPI) Module
general-purpose I/O not affecting the SPI. (See
SPSCK edge is the MSB capture strobe. Therefore, the slave must begin driving its data before the first
SPSCK edge, and a falling edge on the SS pin is used to start the slave data transmission. The slave’s
SS pin must be toggled back to high and then low again between each byte transmitted as shown in
Figure
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.
15.4.3 Transmission Format When CPHA = 1
Figure 15-7
replacement for data sheet parametric information. Two waveforms are shown for SPSCK: one for
CPOL = 0 and another for CPOL = 1. The diagram may be interpreted as a master or slave timing
diagram since the serial clock (SPSCK), master in/slave out (MISO), and master out/slave in (MOSI) pins
are directly connected between the master and the slave. The MISO signal is the output from the slave,
and the MOSI signal is the output from the master. The SS line is the slave select input to the slave. The
slave SPI drives its MISO output only when its slave select input (SS) is low, so that only the selected
slave drives to the master. The SS pin of the master is not shown but is assumed to be inactive. The SS
pin of the master must be high or must be reconfigured as general-purpose I/O not affecting the SPI. (See
15.6.2 Mode Fault
206
15-6.
shows an SPI transmission in which CPHA = 1. The figure should not be used as a
CAPTURE STROBE
FOR REFERENCE
SPSCK; CPOL = 0
MASTER SS
SPSCK; CPOL =1
MISO/MOSI
SPSCK CYCLE #
FROM MASTER
SLAVE SS
SLAVE SS
CPHA = 0
CPHA = 1
SS; TO SLAVE
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
FROM SLAVE
Error.) When CPHA = 1, the master begins driving its MOSI pin on the first SPSCK
MOSI
MISO
Figure 15-5. Transmission Format (CPHA = 0)
MSB
BYTE 1
MSB
Figure 15-6. CPHA/SS Timing
1
BIT 6
BIT 6
2
15.6.2 Mode Fault
BIT 5
BIT 5
3
BYTE 2
BIT 4
BIT 4
4
BIT 3
BIT 3
5
Error.) When CPHA = 0, the first
BIT 2
BIT 2
6
BYTE 3
BIT 1
BIT 1
7
LSB
LSB
8
Freescale Semiconductor
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