MC68908GZ8CFAE Freescale Semiconductor, MC68908GZ8CFAE Datasheet - Page 236
![IC MCU 8K FLASH 8MHZ CAN 48-LQFP](/photos/12/37/123730/mc68908gz8cfae_sml.jpg)
MC68908GZ8CFAE
Manufacturer Part Number
MC68908GZ8CFAE
Description
IC MCU 8K FLASH 8MHZ CAN 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68908GZ8CFJER.pdf
(314 pages)
Specifications of MC68908GZ8CFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, LIN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
37
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
Processor Series
M689xx
Core
HC08
Data Bus Width
8 bit
Data Ram Size
1024 B
Interface Type
ESCI, SPI, UART
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
37
Number Of Timers
2
Operating Supply Voltage
0 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68CBL05AE, DEMO908GZ60E, M68EML08GZE
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Package
48LQFP
Family Name
HC08
Maximum Speed
8 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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Manufacturer
Quantity
Price
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Manufacturer:
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Serial Peripheral Interface (SPI) Module
17.5.2 Transmission Format When CPHA = 0
Figure 17-5
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 at logic 0, 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
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.
236
17-6.
shows an SPI transmission in which CPHA is logic 0. 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
FROM SLAVE
MOSI
MISO
Figure 17-5. Transmission Format (CPHA = 0)
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
MSB
MSB
BYTE 1
Figure 17-6. CPHA/SS Timing
1
BIT 6
BIT 6
2
BIT 5
BIT 5
3
17.7.2 Mode Fault
BYTE 2
BIT 4
BIT 4
4
BIT 3
BIT 3
5
BIT 2
BIT 2
6
Error.) When CPHA = 0, the first
BYTE 3
BIT 1
BIT 1
7
LSB
LSB
8
Freescale Semiconductor
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