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PDF UPD75P238 Data sheet ( Hoja de datos )
| Número de pieza | UPD75P238 | |
| Descripción | 4-BIT SINGLE CHIP MICROCOMPUTER | |
| Fabricantes | NEC | |
| Logotipo |  |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD75P238
4-BIT SINGLE CHIP MICROCOMPUTER
DESCRIPTION
The µPD75P238 is a version of the µPD75238 in which the on-chip mask ROM is replaced by one-time PROM or
EPROM.
The one-time PROM version can be written to once only, and is useful for short-run and multiple device-
production of sets and early start-up. Also, the EPROM version allows programs to be written and rewritten, and
is thus ideal for system evaluation.
Functions are described in detail in the following User's Manual, which should be read when carrying out design
work.
µPD75238 User's Manual : IEU-731
The µPD75P238 EPROM product does not provide a level of reliability suitable for use as a volume
production product for users' devices. The EPROM product should be used solely for function evaluation
in experiments of preproduction.
FEATURES
o µPD75238 pin compatible
o High-voltage display outputs
o On-chip PROM: 32640 × 8
. S0 to S8 & T0 to T9
: Internal pull-down resistors
o On-chip RAM: 1024 × 4
. S9, S16 to S23 & T10 to T15: Open-drain
o Drive capability in same supply voltage range as mask version µPD75238 (2.7 to 6.0 V)
o Ports 4 & 5: No pull-up resistor
o Port 7: No pull-down resistor
Note No internal pull-up and pull-down resistor function by mask option.
USE
VCR, Audio-visual, ECR, Microwave oven
ORDERING INFORMATION
Ordering Code
Package
µPD75P238GJ-5BG
94-pin plastic QFP(s20 mm)
µPD75P238KF
94-pin ceramic WQFN
On-Chip ROM
One-time PROM
EPROM
Quality Grade
Standard
Standard
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.
This manual describes common parts of One-time PROM and EPROM products as PROM.
The information in this document is subject to change without notice.
Document No. IC-2596A
(O.D. No. IC-8014A)
Date Published February 1994 P
Printed in Japan
The mark 5 shows major revised points.
© NEC Corporation 1992
1 page  
µPD75P238
1. PIN FUNCTIONS
1.1 PORT PINS (1/2)
Pin Name
P00
P01
P02
P03
P10
P11
P12
P13
P20
P21
P22
P23
P30 to P33 *2
Dual-Function
Input/Output
Pin
Function
8-Bit I/O
Input
INT4
SCK0
SO0/SB0
4-bit input port (PORT0).
Internal pull-up resistor specification by
software is possible for P01 to P03 as a 3-
bit unit.
×
Input
SI0/SB1
INT0
INT1
INT2
With noise elimination
function
4-bit input port (PORT1).
Internal pull-up resistor specification by
software is possible as a 4-bit unit.
×
TI0
PTO0
Input/output
— 4-bit input/output port (PORT2).
Internal pull-up resistor specification by
PCL software is possible as a 4-bit unit.
×
BUZ
Input/output
MD0 to MD3
Programmable 4-bit input/output port (PORT3).
Input/output settable bit-wise.
Internal pull-up resistor specification by
software is possible as a 4-bit unit.
×
After Reset
Input
Input
Input
Input
P40 to P43 *2 Input/output
N-ch open-drain 4-bit input/output port
—
(PORT4).
Data input/output pins for program memory
write/verify (low-order 4 bits).
Input
Input/Output
Circuit Type*1
B
F –A
F –B
M –C
B –C
E–B
E–C
M–A
P50 to P53 *2 Input/output
N-ch open-drain 4-bit input/output port
(PORT5).
— Data input/output pins for program memory
write/verify (high-order 4 bits).
Input
M–A
P60 to P63
Input/output
P70 to P73
Input/output
Programmable 4-bit input/output port (PORT6).
—
Input/output settable bit-wise.
Internal pull-up resistor specification by
software is possible as a 4-bit unit.
— 4-bit input/output port (PORT7).
Input
Input
E–C
E
* 1. A circle denotes Schmitt-triggerd input.
2. Direct LED drive capability
5
5 Page 
µPD75P238
TYPE I-E
data
Fig. 1-1 Pin Input/Output Circuits (3/3)
TYPE Y
VDD
P-ch
N-ch
VDD
P-ch
OUT
P.D.R
VLOAD
P.D.R: Pull-Down Resistor
IN
AVDD
AVSS
P-ch
AVDD
N-ch
Sam-
pling
C
AVSS
+
-
AVSS
Reference Voltage
(From Series Resistance
String Voltage Tap)
TYPE M-A
TYPE Y-A
IN/OUT
data
output
disable
N-ch
Middle-High Voltage Input Buffer
P.U.RP:.UP.uRl.l:-PUulpl-URpeRseisstisotror
IN
AVDD
AVSS
P-ch
AVDD
N-ch
Sam-
pling
C
AVSS
+
-
AVSS
Reference Voltage
(From Series Resistance
String Voltage Tap)
TYPE M-C
data
output
disable
P.U.R.
enable
VDD
P.U.R.
P-ch
IN/OUT
N-ch
Type B
P.U.RP.:UP.Rul.l:-PUupll-URpesRiestsoisrtor
TYPE Z
AVSS
11
11 Page | ||
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| PDF Descargar | [ Datasheet UPD75P238.PDF ] | |
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