MIPSPR31500 데이터 시트보기 (PDF) - Philips Electronics
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MIPSPR31500 Datasheet PDF : 24 Pages
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Philips Semiconductors
Poseidon embedded processor
Preliminary specification
MIPS
PR31500
IR Module
• IR consumer mode
– allows control of consumer electronic devices such as stereos,
TVs, VCRs, etc.
– programmable pulse parameters
– external analog LED circuitry
• IRDA communication mode
– allows communication with other IRDA devices such as FAX
machines, copiers, printers, etc.
– supported by UART module within PR31500
– external analog receiver preamp and LED circuitry
– data rate = up to 115 Kbps at 1 meter
• IR FSK communication mode
– supported by UART module within PR31500
– external analog IR chip(s) perform frequency modulation to
generate the desired IR communication mode protocol
– data rate = up to 36000 bps at 3 meters
• carrier detect state machine
– periodically enables IR receiver to check if a valid carrier is
present
Power Module
• power-down modes for individual internal peripheral modules
• serial (SPI port) power supply control interface supported
• power management state machine has 4 states: RUNNING,
DOZING, SLEEP, and COMA
Serial Interconnect Bus (SIB) Module
• PR31500 contains holding and shift registers to support the serial
interface to the UCB1100 and/or other optional codec devices
• interface compatible with slave mode 3 of Crystal CS4216 codec
• synchronous, frame-based protocol
• PR31500 always master source of clock and frame frequency and
phase; programmable clock frequency
• each SIB frame consists of 128 clock cycles, further divided into 2
subframes or words of 64 bits each (supports up to 2 devices
simultaneously)
• independent DMA support for audio receive and transmit, telecom
receive and transmit
• supports 8-bit or 16-bit mono telecom formats
• supports 8-bit or 16-bit mono or stereo audio formats
• independently programmable audio and telecom sample rates
• CPU read/write registers for subframe control and status
System Peripheral Interface (SPI) Module
• provides interface to SPI peripherals and devices
• full-duplex, synchronous serial data transfers (data in, data out,
and clock signals)
• PR31500 supplies dedicated chip select and interrupt for an SPI
interface serial power supply
• 8-bit or 16-bit data word lengths for the SPI interface
• programmable SPI baud rate
Timer Module
• Real Time Clock (RTC) and Timer
• 40-bit counter (30.517 µsec granularity);
maximum uninterrupted time = 388.36 days
• 40-bit alarm register (30.517 µsec granularity)
• 16-bit periodic timer (0.868 µsec granularity);
maximum timeout = 56.8 msec
• interrupts on alarm, timer, and prior to RTC roll-over
UART Module
• 2 independent full-duplex UARTs
• programmable baud rate generator
• UART-A port used for serial control interface to external IR
module
• UART-B port used for general purpose serial control interface
• UART-A and UART-B DMA support for receive and transmit
Video Module
• bit-mapped graphics
• supports monochrome, grey scale, or color modes
• time-based dithering algorithm for grey scale and color modes
• supports multiple screen sizes
• supports split and non-split displays
• variable size and relocatable video buffer
• DMA support for fetching image data from video buffer
Little/Big Endian Configuration
The PR31500 can be configures as a Big Endian or as a Little
Endian processor based on the /LB endian pin at power-up.
The byte ordering is as follows:
LITTLE ENDIAN
D[31:24]
D[23:16]
D[15:8]
D[7:0]
/CAS3
/CAS2
/CAS1
/CAS0
BIG ENDIAN
D[7:0]
D[15:8]
D[23:16]
D[31:24]
/CAS0
/CAS1
/CAS2
/CAS3
1996 Sep 24
5
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