The V
RC
4172
TM
companion chip to NEC's V
R
4121
TM
MIPS
RISC microprocessor is designed for high-end
Windows
CE Handheld PC Professional applications. The V
R
4121 microprocessor functions as the host
CPU, while the V
RC
4172 supplies the SDRAM interface, USB interface, host- and peripheral-selectable
IEEE-1284 parallel interface, 16550-compliant serial interface, PS/2 interface, general-purpose I/O ports,
general-purpose chip select signal, and pulse-width modulation for the LCD back light.
In combination, the V
R
4121 and V
RC
4172 offer an excellent performance/cost solution for next-generation
Windows CE applications, forming a superior engine for most, if not all, high-performance Windows
CE-based handheld products.
V
R C
4 1 7 2 C O M P A N I O N C H I P
F O R V
R
4 1 2 1 M I C R O P R O C E S S O R
B L O C K D I A G R A M
SDRAM
V
R
4121
SDRAM
48 MHz
System
Bus
V
RC
4172
General-Purpose
I/O (24-Bit)
Programmable
Chip Select (6-Bit)
Pulse-Width
Modulator Controller
LCD Backlight
Keyboard/Mouse
Dual Port
Dual Port
PS/2 Controller
16550 Serial
Controller 1 and 2
RS-232-C
IEEE-1284
Parallel Controller
PCI Bus
Controller
USB
Host Controller
(OpenHCI 1.0)
Internal
PCI Bus
DRAM
Controller
98YL-0227C (12/98)
O R D E R I N G I N F O R M A T I O N
PART NUMBER
PACKAGE
V
RC
4172
256-pin TBGA
F E A T U R E S
PROCESSOR INTERFACE
--
32-bit LCD interface
--
16-bit mini-ISA bus interface (as defined by V
R
4121)
--
DRAM interface and SDRAM controller for
DMA/master mode
USB HOST CONTROLLER
--
OpenHCI USB 1.0 compliant
--
Standard communication with USB device;
asynchronous communication with host CPU
--
Full-speed (12 Mbps) and low-speed (1.5 Mbps)
operation
--
48-MHz system clock
--
On-chip FIFO
PCI read: 4 x 4 Dword
PCI write: 4 x 4 Dword
USB side: 64 x 1byte
--
Two downstream ports
--
No support for legacy interface
IEEE1284 PARALLEL PORT INTERFACE
--
ECP, EPP, SPP, and P1284 host function with DMA
operation
--
Device function operation
SERIAL PORT INTERFACE
--
Two 16550-compatible serial interfaces
PROGRAMMABLE CHIP SELECT AND
GENERAL-PURPOSE I/O
--
Six chip selects
--
24 general-purpose I/O (GPIO) signals
PS/2 INTERFACE
--
PS/2 keyboard and mouse support
PULSE-WIDTH MODULATION (PWM) FOR
LCD BACKLIGHT
PACKAGE
--
256-pin TBGA (27 mm square)
S A M P L E W I N D O W S C E H / P C P R O F E S S I O N A L I M P L E M E N T A T I O N
LCD Panel
Touch Panel
Soft Modem
Serial Connections
PS/2 Mouse
98YL-0228C (12/98)
Frame
Buffer
USB Devices
RAM
DAA
CODEC
ROM
Graphic Chip Vender
LCD Controller
with Accelerator
VGA Output
RAMDAC
Up to 1024 x 768
V
RC
4172
USB (Host)
Two Serial
Interfaces
One Parallel
Interface
PS/2 Keyboard
PS/2 Mouse
Pulse-Width
Modulator
PC Card
Controller
PC Card
CompactFlash
V
R
4121
131 MHz
168 MHz
Fast IR
CRT
April 1999 NEC Electronics Inc. NEC, V
R
Series, V
RC
4121, V
R
4172 are either trademarks or registered trademarks of NEC Corporation in the United States and/or other countries. Windows and Windows CE are either registered trade-
marks or trademarks of Microsoft Corporation in the United States and/or other countries. All other trademarks are the property of their respective owners. No part of this document may be copied or reproduced in any form or by any means
without the prior written consent of NEC Electronics Inc. (NECEL). The information in this document is subject to change without notice. ALL DEVICES SOLD BY NECEL ARE COVERED BY THE PROVISIONS APPEARING IN NECEL TERMS
AND CONDITIONS OF SALES ONLY, INCLUDING THE LIMITATION OF LIABILITY, WARRANTY, AND PATENT PROVISIONS. NECEL makes no warranty, express, statutory, implied, or by description, regarding information set forth herein or
regarding the freedom of the described devices from patent infringement. NECEL assumes no responsibility for any errors that may appear in this document. NECEL makes no commitments to update or to keep current information contained in
this document. The devices listed in this document are not suitable for use in applications such as, but not limited to, aircraft control systems, aerospace equipment, submarine cables, nuclear reactor control systems, and life-support systems.
"Standard" quality grade devices are recommended for computers, office equipment, communication equipment, test and measurement equipment, machine tools, industrial robots, audio and visual equipment, and other consumer products. For
automotive and transportation equipment, traffic control systems, and anti-disaster and anti-crime systems, it is recommended that the customer contact the responsible NECEL salesperson to determine the reliability requirements for any such
application and any cost adder. NECEL does not recommend or approve use of any of its products in life-support devices or systems or in any application where failure could result in injury or death. If customers wish to use NECEL devices in appli-
cations not intended by NECEL, customers must contact the responsible NECEL salespeople to determine NECEL's willingness to support a given application.
Document # U14034EU2V0PB00
For literature, call 1-800-366-9782 7 a.m. to 6 p.m. Pacific time
or fax your request to 1-800-729-9288
or visit our Web site at www.necel.com
PDF 
ZIP