UPD65948S1 Datasheet PDF - NEC Electronics
Part Number | UPD65948S1 | |
Description | VRC4375 System Controller | |
Manufacturers | 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 ! .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 MIPS RISC 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
|
|
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
Preview 5 Page |
Part DetailsOn 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 Number | Description | MFRS |
UPD65948S1 | The function is VRC4375 System Controller. NEC Electronics | |
Semiconductors commonly used in industry:
1N4148 |  
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
UPD6
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA |