參數(shù)資料
型號(hào)： PR31500
廠商： NXP Semiconductors N.V.
英文描述： Poseidon Embedded Processor(Poseidon 嵌入式處理器)
中文描述： 海神嵌入式處理器（波塞冬嵌入式處理器）
文件頁(yè)數(shù)： 5/24頁(yè)
文件大?。?/td> 276K
代理商： PR31500
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
μ
sec granularity);
maximum uninterrupted time = 388.36 days
40-bit alarm register (30.517
μ
sec granularity)
16-bit periodic timer (0.868
μ
sec 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
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