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Número de pieza | UPD75328GC | |
Descripción | 4-BIT SINGLE-CHIP MICROCOMPUTER | |
Fabricantes | NEC | |
Logotipo | ||
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No Preview Available ! DATA SHEET
MOS INTEGRATED CIRCUIT
µPD75328
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The µPD75328 is one of the 75X Series 4-bit single-chip microcomputer, and has a data processing
capability comparable to that of an 8-bit microcomputer.
In addition to high-speed operation with 0.95 µs minimum instruction execution time for the CPU, the
µPD75328 can also process data in 1-, 4-, and 8-bit units. Therefore, as a 4-bit single-chip microcomputer
chip having a built-in LCD controller/driver and A/D converter, its data processing capability is the highest
in its class in the world.
The µPD75P328 with one-time PROM, which is replaced with the internal mask ROM for a µPD75328,
is applicable for evaluating systems under development, or for small-scale production of developed
systems.
"Detailed functions are described in the following user's manual. Be sure to read it for designing."
"µPD75328 User's Manual: IEM-5045"
FEATURES
• Capable of high-speed operation and variable instruction execution time to power save
• 0.95 µs, 1.91 µs, 15.3 µs (Main system clock: operating at 4.19 MHz)
• 122 µs (Subsystem clock: operating at 32.768 kHz)
• 75X architecture comparable to that for an 8-bit microcomputer is employed
• Built-in programmable LCD controller/driver
• Built-in 8-bit resolution A/D converter: 6 channels
• Clock operation at reduced power dissipation: 5 µA TYP. (operating at 3 V)
• Timer function: 3 channels
• Interrupt functions especially enhanced for applications, such as remote control receiver
• Pull-up resistors can be provided for 35 I/O lines
• Built-in NEC standard serial bus interface (SBI)
APPLICATIONS
Cameras, blood pressure gauges, airconditioners, etc.
ORDERING INFORMATION
Part Number
µPD75328GC-xxx-3B9
Package
80-pin plastic QFP (s14mm)
Quality Grade
Standard
Remarks: xxx is ROM code number.
Please refer to “Quality Grade on NEC Semiconductor Devices” (Document Number IEI-1209)
published by NEC Corporation to know the specification of quality grade on the devices and its
recommended applications.
The information in this document is subject to change without notice.
Document No. IC-2763B
(O. D. No. IC-7628D)
Date Published November 1993 P
Printed in Japan
The mark 5 shows the major revised points.
© NEC Corporation 1990
1 page µPD75328
APPENDIX A. COMPARISON OF FEATURES BETWEEN µPD75328 AND µPD75308 ........ 62
APPENDIX B. DEVELOPMENT TOOLS ...................................................................................... 63
APPENDIX C. RELATED DOCUMENTS ..................................................................................... 64
5
5 Page µPD75328
(cont'd)
Pin Name Input/Output Also Served
As
Function
X1, X2
—
XT1, XT2
—
RESET
Input
To connect the crystal/ceramic oscillator to
the main system clock generator. When
— inputting the external clock, input the
external clock to pin X1, and the reverse
phase of the external clock to pin X2.
To connect the crystal oscillator to the
subsystem clock generator.
—
When the external clock is used, pin XT1
inputs the external clock. In this case, pin
XT2 must be left open.
Pin XT1 can be used as a 1-bit input pin.
— System reset input
NC *2
—
— No connection
VDD
—
— Positive power supply
VSS —
— GND
When Reset
Input/
Output
Circuit
TYPE*1
——
——
—B
——
——
——
*1: Circles indicate schmidt trigger inputs.
2: When sharing the printed circut board with the µPD75P328, the NC pin must be connected to
VDD.
3: These pins are provided for future system expansion. At present, these pins are used only as
pins P30 and P31.
4: For these display output, VLCX indicated below are selected as the input source.
S12 to S31: VLC1, COM0 to COM2: VLC2, COM3: VLC0
However, display output level varies depending on the particular display output and VLCX
external circuit.
Example: Since BP0-7 are connected to each other within the µPD75328 as shown in the diagram
below, the output level of BP0-7 depends on the size of R1, R2 and R3.
µ PD75328
V DD
V LC1
ON
BP 0
R2
R1
ON
BP 1
R3
5: Step-down resistor network provided : Low level
Step-down resistor network not provided : High impedance
11
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