MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 421

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

18.8.6 Bidirectional Mode
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Bidirectional Mode
Normal Mode
SPC0 = 0
SPC0 = 1
SPE = 1
Table 18-7. Normal Mode and Bidirectional Mode
SWOM enables open drain output
SWOM enables open drain output.
SPI port pin 0 is general-purpose I/O.
Setting the SPC0 bit in SPICR1 selects bidirectional mode (see
Table
external device(s). The MSTR bit determines which pin to use. In master
mode, the MOSI pin is the master out/master in pin, MOMI. In slave
mode, the MISO pin is the slave out/slave in pin, SISO. The MISO pin in
master mode and MOSI pin in slave mode are general-purpose I/O pins.
The direction of each data I/O pin depends on its data direction register
bit. A pin configured as an output is the output from the shift register. A
pin configured as an input is the input to the shift register, and data
coming out of the shift register is discarded.
The SCK pin is an output in master mode and an input in slave mode.
The SS pin can be an input or an output in master mode, and it is always
an input in slave mode.
In bidirectional mode, a mode fault does not clear DDRSP0, the data
direction bit for the SISO pin.
SERIAL OUT
SERIAL OUT
SERIAL IN
SERIAL IN
Freescale Semiconductor, Inc.
SPI
SPI
For More Information On This Product,
Master Mode, MSTR = 1
18-7). The SPI uses only one data pin for the interface with
Serial Peripheral Interface Module (SPI)
DDRSP1
DDRSP1
Go to: www.freescale.com
SPI PORT
MOMI
MOSI
MISO
PIN 0
.
SWOM enables open drain output
SWOM enables open drain output.
SPI port pin 1 is general-purpose I/O.
Ã
Serial Peripheral Interface Module (SPI)
SERIAL OUT
SERIAL OUT
SERIAL IN
SERIAL IN
SPI
SPI
Slave Mode, MSTR = 0
DDRSP0
DDRSP0
Functional Description
Advance Information
SPI PORT
MOSI
MISO
PIN 1
SISO
.
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