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PR31500 Datasheet(PDF) 5 Page - NXP Semiconductors |
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PR31500 Datasheet(HTML) 5 Page - NXP Semiconductors |
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5 / 24 page  Philips Semiconductors Preliminary specification MIPS PR31500 Poseidon embedded processor 1996 Sep 24 5 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 BIG ENDIAN D[31:24] D[7:0] D[23:16] D[15:8] D[15:8] D[23:16] D[7:0] D[31:24] /CAS3 /CAS0 /CAS2 /CAS1 /CAS1 /CAS2 /CAS0 /CAS3 |
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