SPEAr600 Architecture overview
The SPEAr600 has a Fast IrDA controller.
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Main features:
● Supports the following standards:
– IrDA serial infrared physical layer specification (IrPHY), version 1.3
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– IrDA link access protocol (IrLAP), version 1.1
Supports the following infrared modes and baud rates:
– Serial infrared (SIR), with rates 9.6 kbps, 19.2 kbps, 38.4 kbps, 57.6 kbps and
115.2 kbps
– Medium Infrared (MIR), with rates 576 kbps and 1.152 Mbps
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– Fast Infrared (FIR), with rate 4 Mbps
Transceiver interface compliant to all IrDA transceivers with configurable TX and RX signal polarity
Half-duplex infrared frame transmission and reception
16-bit CRC algorithm for SIR and MIR, and 32-bit CRC algorithm for FIR
Generates preamble, start and stop flags
Uses the RZI (Return-to-Zero Inverted) modulation/demodulation scheme for SIR and
MIR, and the 4PPM (4 Pulse Position Modulation) modulation/demodulation scheme for FIR
Provides synchronization by means of a DPLL in FIR mode
Easily adaptable to different bus systems with 32-bit register interface and FIFO with configurable FIFO size
2.17 I
2
S audio block
SPEAr600 contains three I
2
S interfaces providing the following features.
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Main features:
● Conversion of AHB protocol to I
2
S protocol and vice versa
● Supports 2.0, 2.1 and 3.1 audio outputs (I
2
S master mode)
32 (16L + 16R) and 64 bit (32L + 32R) of raw PCM data length supported
MIC/Line-In (2.0) recording (I2S master/slave mode)
Stereo headphone out
The System Controller provides an interface for controlling the operation of the overall system.
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Main features:
Power saving system mode control
Crystal oscillator and PLL control
Configuration of system response to interrupts
Doc ID 16259 Rev 3 19/97
