Parallel Interface; Serial Interface; Versa P Series Chip Set; Versa P Series Chip Types And Technologies - NEC VERSA P Service Manual

PARALLEL INTERFACE

The system's parallel interface integrates National's PC87332VLJ chip. It uses a 25-pin D-
subconnector that is Enhanced Capabilities Port (ECP) equipped. The port is located on the
system's rear panel.
The user selects between three parallel interface modes using Auto Setup. These include
unidirectional, bidirectional or enhanced. Unidirectional mode sends data output from the
standard ISA port only. Bidirectional mode sends data using the standard ISA port or PS/2
technology. Enhanced mode enables high speed data transmission to occur using either the
unidirectional or bidirectional modes.
The parallel port address is 378h and the interrupt level is IRQ07. Pin locations for the par-
allel interface are listed in Appendix A.

SERIAL INTERFACE

The RS-232C serial port is a 9-pin connector on the system's rear panel. The serial port
consists of a 16550 compatible serial port controller with a programmable baud rate within
50/56000 bps. The serial port connects an RS-232C device or an external modem. The se-
rial port address is 3F8h and the interrupt level is IRQ04.

VERSA P SERIES CHIP SET

Refer to Table Section 1-6 for a quick summary of the chip types used in the system. See
the Abbreviations section at the beginning of this manual for a translation of chip technolo-
gies.
Table Section 1-6 Versa P Series Chip Types and Technologies
Chip
P54C
PT86C868/
PT86C718
N28F020-150
PT86C718
C&T65545
PC87334VJG
M38802M2-001HP
CL-PD6720-B-2
Manufacturer Description
Intel 75 MHz CPU
Pico Power System Logic
Intel 256k x 8 Flash ROM
Pico Power IDE Interface, Peripheral
Controller, Interrupt
Multiplexer
Chips & VGA Controller
Technologies
National Diskette Controller, IDE,
Semiconductor Parallel Interface
Mitsubishi Keyboard Controller
Cirrus Logic PCMCIA Controller
Technical Information
Technology
320-pin TCP
144-pin TQFP/
176-pin TQFP
32-pin PLCC
176-pin TQFP
208-pin QFP
100-pin TQFP
64-pin TQFP
208-pin QFP
1-13