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參數(shù)資料
| 型號： | VRC4373 |
| 英文描述： | SYSTEM CONTROLLER |
| 中文描述： | 系統(tǒng)控制器 |
| 文件頁數(shù)： | 1/66頁 |
| 文件大小： | 721K |
| 代理商： | VRC4373 |
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Data Sheet
U13504EU1V1DS00
1
February 2000
Description
The V
RC
4372
TM
is a PCI-based I/O controller for high-performance, low-cost system
implementation. Connected to the PCI bus, it is designed to support NEC’s V
R
43xx
CPU, interfacing between the V
RC
4373
TM
or V
RC
4375
TM
system controller and
peripherals for tethered applications such as set-top boxes, printers, network
computers and consumer electronics.
Features
!
Compatible with NEC V
R
43xx CPUs and V
RC
4373 and V
RC
4375 system
controllers
PCI Bus Interface Controller
Compliant with the 3.3-volt PCI interface specification (version 2.1)
5-volt PCI signaling in a controlled environment (with voltage spikes less than
7.6 volts and DC levels less than 6.6 volts)
PCI bus arbitration for one internal and six external PCI masters
I/O Controller
ISA-like, 16-bit I/O bus and four independent direct memory access (DMA)
channels
Ten chip selects and control signals for interfacing to external peripheral chips
N-to-3 interrupt controller to regulate interrupts from 14 input pins, two internal
timers, the keyboard, the mouse, and four DMA channels can be encoded
onto one of three outgoing interrupt lines
Four programmable DMA channels
Unique TC, EOP DREQ, and DACK signals on each channel
Block or single transfers
Read or write requests
I/O device-demanded service requests via DREQx
Software-initiated requests
Channel suspend via the MASK register bit
I/O device transfer termination via EOP
Channel reload notification and termination notification via an interrupt
Efficient PCI bus data packing mode
Byte/short scattering/gathering capabilities (one per PCI word)
Miscellaneous I/O
Timer and a beeper source
General-purpose control/status I/O pins
Test Port
TESTOE signal that can be used to tristate all outputs
SCAN pin to place the chip in scan mode
Data buffers for direct memory access channels and the I/O bus
33-MHz bus frequency
!
!
!
!
!
!
!
V
RC
4372 I/O Controller
with PCI Interface
NEC V
RC
chipsets are designed for use with NEC V
R
Series microprocessors. NEC makes no claim
as to the suitability of V
RC
chipsets for use with non-NEC microprocessors and does not warrant
their performance, suitability or use in such applications.
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