DataSheet39.com

What is UPD65948S1?

This electronic component, produced by the manufacturer "NEC Electronics", performs the same function as "VRC4375 System Controller".


UPD65948S1 Datasheet PDF - NEC Electronics

Part Number UPD65948S1
Description VRC4375 System Controller
Manufacturers NEC Electronics 
Logo NEC Electronics Logo 


There is a preview and UPD65948S1 download ( pdf file ) link at the bottom of this page.





Total 30 Pages



Preview 1 page

No Preview Available ! UPD65948S1 datasheet, circuit

.com V 4375 System ControllerRC
heet4UData Sheet
ataSDescription
www.D www.DataSheet4U.com U.comFeatures
August 2000
The VRC4375TM system controller is a software-configurable chip that interfaces directly
with an NEC VR43xxTM 64-bit MIPSRISC CPU and PCI bus without external logic or
buffering. The system controller also interfaces with memory (SDRAM, EDO, fast-page
DRAM, and flash/boot ROM) with minimal to no buffering. The memory bus can also
interface with SRAM and general-purpose I/O devices. As an interface with the VR43xx
CPU, the VRC4375 acts as a memory controller, DMA controller, and PCI bridge. As an
interface with PCI agents, the VRC4375 acts as either a PCI bus master or a PCI bus
target. Alternatively, the VRC4375 may be located on a PCI bus add-on board.
Y CPU Interface
Direct connection to the 66 MHz VR43xx CPU bus
3.3-volt I/O
Support for all VR43xx bus cycles
Little-endian or big-endian byte ordering modes
Y Memory Interface
Support for boot ROM/flash memory, base memory, and up to two SIMMs
SIMM capacity of up to 128 MB
Programmable address ranges for base and SIMM memory
Support for two-bank 4/16 Mb devices and four-bank 64/128/256 Mb devices
CAS latency of 2 or 3 in base memory or SIMM SDRAM, programmable to
support faster new devices or slower legacy devices
SIMM burst access time programmable in one or two cycle(s)
66 MHz memory bus
64 MB base memory range: SDRAM and EDO DRAM
256 MB SIMM memory range: SDRAM, EDO and fast-page DRAM
Several speed grades supported within each memory range
Open DRAM page maintained within base memory
Eight-word (32-byte) write FIFO (CPU to memory)
Two-word (8-byte) prefetch FIFO (memory to CPU or memory to PCI)
On-chip DRAM and SDRAM refresh generation
Up to 64 MB of write-protectable boot ROM or up to 64 MB of flash ROM
Flash/boot ROM devices with 8-/16-/32-bit configuration support
Programmable timing to interface general-purpose I/O device or boot ROM in
the boot ROM address range
www.DataSheet4U13749EU2V0DS00
NEC VRC chipsets are designed and Verified for use with NEC VR Series™ microprocessors. NEC makes
no claim as to the suitability of VRC chipsets for use with non-NEC microprocessors and does not warrant
their performance, suitability or use in such applications.
1

line_dark_gray
UPD65948S1 equivalent
Contents
VRC4375 System Controller
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.0 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.0 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.0 Signal Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.0 Registers, Resources, and Implementation . . . . . . . . . . . . . . . . . . . 14
5.0 CPU Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.0 Memory Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.0 PCI Bus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.0 DMA Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
9.0 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
10.0 Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
11.0 Reset Configuration Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
12.0 Endian Mode Software Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
13.0 Timing Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
14.0 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
15.0 Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
5


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for UPD65948S1 electronic component.


Information Total 30 Pages
Link URL [ Copy URL to Clipboard ]
Download [ UPD65948S1.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
UPD65948S1The function is VRC4375 System Controller. NEC ElectronicsNEC Electronics

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

UPD6     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search