MC13212 Freescale Semiconductor, MC13212 Datasheet - Page 15

• Manufacturer Part Number: MC13212
• Description: IC TXRX RF 2.4GHZ FLSH 32K 71LGA
• Manufacturer: Freescale Semiconductor
• Series: MC1321xr

Specifications of MC13212

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3dBm
• Sensitivity: -92dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 42mA
• Current - Transmitting: 35mA
• Data Interface: PCB, Surface Mount
• Memory Size: 32kB Flash, 2kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 71-LGA
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.2
3.3
Figure 5
Figure 5
(master) initiates all SPI transfers. During a transfer, the master shifts data out (on the MOSI pin) to the
slave while simultaneously shifting data in (on the MISO pin) from the slave. Although the SPI interface
supports simultaneous data exchange between master and slave, the modem SPI protocol only uses data
exchange in one direction at a time. The SPSCK signal is a clock output from the master and an input to
the slave. The slave device must be selected by a low level on the slave select input (SS1 pin).
Freescale Semiconductor
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MCU bus master
Modem bus slave
Programmable SPI clock rate; maximum rate is 8 MHz
Double-buffered transmit and receive at MCU
Serial clock phase and polarity must meet modem requirements (MCU control bits
Slave select programmed to meet modem protocol
shows the SPI system level diagram.
shows the SPI modules of the MCU and modem in the master-slave arrangement. The MCU
SPI Features
SPI System Block Diagram
7
6
MCU (MASTER)
GENERATOR
SPI SHIFTER
5
CLOCK
4
3
2
1
0
MC13211/212/213 Technical Data, Rev. 1.8
Figure 5. SPI System Block Diagram
MOS1
MISO1
SPSCK1
PTE2/SS1
SPICLK
MOSI
MISO
CE
MODEM (SLAVE)
7
6
SPI SHIFTER
5
4
3
2
1
0
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