MC1323X_1 Datasheet, PDF (14/38 Pages) Freescale Semiconductor, Inc – Low Cost SoC Remote Control Platform for the 2.4 GHz IEEE® 802.15.4 Standard

• Receiver wake-up by idle-line or address-mark
• Optional 13-bit break character generation / 11-bit break character detection
• Selectable transmitter output polarity
8.4 Serial Peripheral Interface (SPI) Module
The MC1323x has one serial peripheral interface module. The SPI is a synchronous serial data
input/output port used for interfacing with serial memories, peripheral devices, or other processors. The
SPI allows an 8-bit serial bit stream to be shifted simultaneously into and out of the device at a
programmed bit-transfer rate (called 4-wire mode). There are four pins associated with the SPI port
(SPCLK, MOSI, MISO, and SS).
The SPI module can be programmed for master or slave operation. It also supports a 3-wire mode where
for master mode the MOSI becomes MOMI, a bidirectional data pin, and for slave mode the MISO
becomes SISO, a bidirectional data pin. In 3-wire mode, data is only transferred in one direction at a time.
The SPI bit clock is derived from the peripheral input clock with a maximum 16 MHz operation. A
programmable prescaler (maximum divide-by-8) drives a second baud rate programmable divider
(maximum divide-by-256) to develop the bit clock. The maximum SPI transfer rate is 8 MHz.
Features of SPI module include:
• Master or slave mode operation
• Full-duplex or single-wire bidirectional option
• 8-Bit only transfer size
• Programmable transmit bit rate (8 MHz max)
• Double-buffered transmit and receive
• Serial clock phase and polarity options (supports all 4 options)
• Optional slave select output
• Selectable MSB-first or LSB-first shifting
8.5 Inter-integrated Circuit (IIC) Interface Module
The MC1323x has one inter-integrated circuit interface module that provides a method of communication
between a number of other integrated circuits. The IIC Bus interface provides a bidirectional, 2-pin (SDA
bus data and SCL bus clock) serial bus designed to operate up to 100 kbps with maximum bus loading and
timing. The module is capable of operating at higher baud rates, up to a maximum of peripheral clock/20
(800 kbps), with reduced bus loading.
Features of IIC module include:
• Compatible with IIC bus standard
• Multi-master operation
• Software programmable clock frequencies
• Software selectable acknowledge bit
• Interrupt driven byte-by-byte data transfer
MC1323x Advance Information, Rev. 0.0
14
Freescale Semiconductor