參數(shù)資料
型號(hào)： PR31700
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 32-bit RISC Microprocessor(32位 RISC微處理器)
中文描述： 32-BIT, 75 MHz, RISC PROCESSOR, PQFP208
封裝： PLASTIC, LQFP-208
文件頁數(shù)： 21/36頁
文件大?。?/td> 378K
代理商： PR31700
Philips Semiconductors
Preliminary specification
PR31700
32-bit RISC microprocessor
1998 May 13
21
PERIPHERAL FUNCTIONS
CLOCK GENERATOR
The PR31700 uses an internal PLL and an external crystal oscillator
to generate a clock with eight times the input clock frequency. The
PLL oscillation can be halted externally to reduce power dissipation.
WRITE BUFFER
The PR31700 incorporates a four-stage write buffer.
BUS INTERFACE UNIT (BIU) MODULE
The PR31700 has a Bus Interface Unit with the following features.
supports 2 Banks of SDRAM and/or DRAM / HDRAM
–
8-bit or 16-bit SDRAM configuration
–
16-bit or 32-bit DRAM configuration
–
16-bit or 32-bit HDRAM configuration
–
4 Mbit, 16 Mbit and 64 Mbit parts supported
–
page mode reads and writes supported
–
independent refresh counters for each bank
–
self refreshing parts supported to retain memory when
system is powered down
4 general purpose chip selects (CS3*–CS0*)
–
16-bit or 32-bit ports
–
programmable wait states
–
read page mode
4 general purpose chip selects (MCS3*–MCS0*)
–
16-bit ports
–
programmable wait states
–
read page mode
2 full PCMCIA slots
–
16-bit ports
–
IORD and IOWR provided to support I/O cards
–
WAIT signal supported
SYSTEM INTERFACE UNIT (SIU) MODULE
The PR31700 has a System Interface Unit with the following
features.
multi-channel 32-bit DMA controller
independent DMA controller for video, SIB to/from BETTY
audio/telecom codecs, high-speed serial port, IR, UART, and
general purpose UART
address decoding for the internal registers
CLOCK MODULE
The PR31700 has a Clock Module with the following features.
The PR31700 supports system-wide single crystal
configuration, besides the 32 kHz RTC XTAL (reduces cost,
power, and board space)
common crystal rate divided to generate clock for CPU,
video, sound, telecom, UARTs, etc.
independent enabling or disabling of individual clocks under
software control, for power management
CONCENTRATION HIGHWAY INTERFACE (CHI) MODULE
The PR31700 has a CHI Module with the following features.
high-speed serial Concentration Highway Interface (CHI)
contains logic for interfacing to external full-duplex serial
time-division-multiplexed (TDM) communication peripherals
supports ISDN line interface chips and other PCM/TDM
serial devices
CHI interface is programmable (number of channels, frame
rate, bit rate, etc.) to provide support for a variety of
formats
supports data rates up to 4.096 Mbps
independent DMA support for CHI receive and transmit
INTERRUPT MODULE
The PR31700 has an Interrupt Module with the following features.
contains logic for individually enabling, reading, and clearing
all PR31700 interrupt sources
interrupts generated from internal PR31700 modules or from
edge transitions on external signal pins
IO MODULE
The PR31700 has an IO Module with the following features.
contains support for reading and writing the 7 bi-directional
general purpose IO pins and the 32 bi-directional
multi-function IO pins
each IO port can generate a separate positive and negative
edge interrupt
independently configurable IO ports allow the PR31700 to
support a flexible and wide range of system applications and
configurations
IR MODULE
The PR31700 has an IR Module with the following features.
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
–
not compatible with General Magic Cap Devices
–
allows communication with other IRDA devices such as
FAX machines, copiers, printers, etc.
–
supported by the UART module within the PR31700
–
external analog receiver preamp and LED circuitry
–
data rate = up to 115 kbps at 1 meter
IR FSK communication mode
–
compatible with GeneraI Magic Cap Devices
–
supported by the UART module within the PR31700
–
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
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