MC9S08JM60CLH Freescale, MC9S08JM60CLH Datasheet - Page 256
MC9S08JM60CLH
Manufacturer Part Number
MC9S08JM60CLH
Description
Manufacturer
Freescale
Datasheet
1.MC9S08JM60CLH.pdf
(388 pages)
Specifications of MC9S08JM60CLH
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
24MHz
Interface Type
SCI/SPI
Total Internal Ram Size
4KB
# I/os (max)
51
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
12-chx12-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
60KB
Lead Free Status / RoHS Status
Compliant
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Serial Peripheral Interface (S08SPI16V1)
15.4
15.4.1
The SPI system is enabled by setting the SPI enable (SPE) bit in SPI Control Register 1. While the SPE
bit is set, the four associated SPI port pins are dedicated to the SPI function as:
An SPI transfer is initiated in the master SPI device by reading the SPI status register (SPIxS) when
SPTEF = 1 and then writing data to the transmit data buffer (write to SPIxDH:SPIxDL). When a transfer
is complete, received data is moved into the receive data buffer. The SPIxDH:SPIxDL registers act as the
SPI receive data buffer for reads and as the SPI transmit data buffer for writes.
The clock phase control bit (CPHA) and a clock polarity control bit (CPOL) in the SPI Control Register 1
(SPIxC1) select one of four possible clock formats to be used by the SPI system. The CPOL bit simply
selects a non-inverted or inverted clock. The CPHA bit is used to accommodate two fundamentally
different protocols by sampling data on odd numbered SPSCK edges or on even numbered SPSCK edges.
The SPI can be configured to operate as a master or as a slave. When the MSTR bit in SPI control register
1 is set, master mode is selected, when the MSTR bit is clear, slave mode is selected.
15.4.2
The SPI operates in master mode when the MSTR bit is set. Only a master SPI module can initiate
transmissions. A transmission begins by reading the SPIxS register while SPTEF = 1 and writing to the
master SPI data registers. If the shift register is empty, the byte immediately transfers to the shift register.
The data begins shifting out on the MOSI pin under the control of the serial clock.
The SPR2, SPR1, and SPR0 baud rate selection bits in conjunction with the SPPR2, SPPR1, and SPPR0
baud rate preselection bits in the SPI Baud Rate register control the baud rate generator and determine the
speed of the transmission. The SPSCK pin is the SPI clock output. Through the SPSCK pin, the baud rate
generator of the master controls the shift register of the slave peripheral.
In master mode, the function of the serial data output pin (MOSI) and the serial data input pin (MISO) is
determined by the SPC0 and BIDIROE control bits.
If MODFEN and SSOE bit are set, the SS pin is configured as slave select output. The SS output becomes
low during each transmission and is high when the SPI is in idle state.
If MODFEN is set and SSOE is cleared, the SS pin is configured as input for detecting mode fault error.
If the SS input becomes low this indicates a mode fault error where another master tries to drive the MOSI
256
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Slave select (SS)
Serial clock (SPSCK)
Master out/slave in (MOSI)
Master in/slave out (MISO)
SPSCK
MOSI, MISO pin
SS pin
Functional Description
General
Master Mode
MC9S08JM60 Series Data Sheet, Rev. 3
Freescale Semiconductor
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