mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 738

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Communication Processor Module
16.9.20.2 MIDDLE-SPEED IRDA PROTOCOL. The middle-speed IrDA protocol consists
of a data link layer and a physical layer.
• The data link layer is derived from the preexisting synchronous HDLC protocol
• The physical layer defines the electrical parameters of the signals between the
standard. The frame format follows the standard HDLC format except that it requires
two start flags. The frame consists of two start flags, an address field, a control field, an
information field, a frame check sequence field and minimum of one ending flag. 0x7E
is used for the start flag as well for the end flag.
encoder/decoder module and the infrared transducer module. The signal waveform is
shown in Figure 16-94. For 0.576 and 1.152Mb/s, the minimum and maximum pulse
duration are the nominal
tolerance).
START FLAG
(A)
(B)
1 BYTE
Figure 16-94. Middle-Speed IrDA Data Format
START FLAG
Figure 16-93. Middle Speed Packet Format
1 BYTE
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1
1
/
4
MPC823 REFERENCE MANUAL
ADDRESS
of the bit duration (plus or minus the protocol-defined
1 BYTE
0
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1
CONTROL
1 BYTE
DATA BITS
0
INFORMATION
0
N BYTES
1
1/4 BIT TIME
2 BYTES
CRC
1
END FLAG
0
1 BYTE
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