DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD75P238
4-BIT SINGLE CHIP MICROCOMPUTER
DESCRIPTION
The
µ
PD75P238 is a version of the
µ
PD75238 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.
µ
PD75238 User's Manual : IEU-731
The
µ
PD75P238 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
µ
PD75238 pin compatible
o On-chip PROM: 32640
×
8
o On-chip RAM: 1024
×
4
o High-voltage display outputs
. S0 to S8 & T0 to T9
: Internal pull-down resistors
. S9, S16 to S23 & T10 to T15: Open-drain
o Drive capability in same supply voltage range as mask version
µ
PD75238 (2.7 to 6.0 V)
o Ports 4 & 5: No pull-up resistor
o Port 7: No pull-down resistor
Note
USE
VCR, Audio-visual, ECR, Microwave oven
No internal pull-up and pull-down resistor function by mask option.
ORDERING INFORMATION
Ordering Code
Package
94-pin plastic QFP(s 20 mm)
s
94-pin ceramic WQFN
On-Chip ROM
One-time PROM
EPROM
Quality Grade
Standard
Standard
µ
PD75P238GJ-5BG
µ
PD75P238KF
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
µ
PD75P238
PIN CONFIGURATION (TOP VIEW)
RESET
P00/INT4
P01/SCK0
P02/SO0/SB0
P03/SI0/SB1
P11/INT1
P12/INT2
P13/TI0
P20/PTO0
P21
P22/PCL
P23/BUZ
P30/MD0
P10 /INT0
94 93 92919089
AN0
AV
REF
AV
DD
V
DD
V
PP
X2
X1
IC
XT2
XT1
V
SS
S16/P100
S17/P101
S18/P102
S19/P103
S20/P110
S21/P111
S22/P112
S23/P113
S0/P120
S1/P121
S2/P122
S3/P123
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
87
88 868584 8382 81807978777675747372
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
44 45 46 47
P32/MD2
P33/MD3
P40
P41
P42
P43
V
SS
P50
P51
P52
P53
P60
P61
P62
P63
P70
P71
P72
P73
P80/PPO
P81/SCK1
P82/SO1
P83/SI1
V
DD
21
22
23
24 25262728 293031 3233 343536373839404142 43
T15/S10/P142
T14/S11/P143
PH0/T13/S12/P150
PH1/T12/S13/P151
PH2/T11/S14/P152
Note
Ensure that power is supplied to the V
DD
and V
SS
pins (pins 4, 11, 30, 48, and 65).
IC (Internally Connected) pins should be connected directly to V
SS
.
Remarks
2
PH3/T10/S15/P153
T9
T8
T7
T6
T5
T4
T3
T2
T1
T0
S4/P130
S5/P131
S6/P132
S7/P133
S8/P140
S9/P141
V
DD
V
LOAD
P31/MD1
AN4/P90
AN5/P91
AN6/P92
AN7/P93
AV
SS
AN1
AN2
AN3
µ
PD75P238GJ- 5BG
µ
PD75P238KF
µ
PD75P238
PIN NAME
P00
P10
P20
P30
P40
P50
P60
P70
to
to
to
to
to
to
to
to
P03
P13
P23
P33
P43
P53
P63
P73
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
Port0
Port1
Port2
Port3
Port4
Port5
Port6
Port7
Port8
Port9
Port10
Port11
Port12
Port13
Port14
Port15
PortH
Digit Output
Segment Output
Positive Power Supply
SCK0, SCK1
SO0, SO1
SI0, SI1
SB0, SB1
:
:
:
:
Serial
Serial
Serial
Serial
Clock I/O 0, 1
Data Output 0, 1
Data Input 0, 1
Bus I/O 0, 1
INT0, INT1, INT4 : External Vectored Interrupt Input 0, 1, 4
INT2
: External Test Input 2
PPO
: Programmable Pulse Output
TI0
: Timer Input 0
PTO0
BUZ
PCL
AN0 to AN7
AV
REF
AV
DD
AV
SS
X1, X2
XT1, XT2
RESET
V
PP
MD0 to MD3
:
:
:
:
:
:
:
:
:
:
:
:
Programmable Timer Output 0
Buzzer Clock
Programmable Clock Output
Analog Input 0 to 7
Analog Reference Voltage
Analog V
DD
Analog V
SS
Main System Clock Oscillation 1, 2
Subsystem Clock Oscillation 1, 2
Reset
Programming Power Supply
Mode Selection 0 to 3
P80 to P83
P90 to P93
P100 to P103
P110 to P113
P120
P130
P140
P150
to
to
to
to
P123
P133
P143
P153
PH0 to PH3
T0 to T15
S0 to S23
V
DD
V
SS
V
LOAD
: Ground
IC
: Power Supply for FIP Driver
: Internally Connected
3
4
PORT
0
4
4
P10-P13
P20-P23
P30/MD0
-P33/MD3
P40-P43
P50-P53
4
4
PORT 7
PORT 8
PORT 9
4
4
P60-P63
P70-P73
P80-P83
P90-P93
4
4
4
4
P00-P03
PORT 1
SP (8)
PROGRAM
COUNTER (15)
ALU
SBS (2)
PORT 2
PORT 3
PORT 4
PORT 5
GENERAL REG.
PORT 6
DECODE
AND
CONTROL
RAM
DATA
MEMORY
1024
×
4
BANK
CY
BASIC
INTERVAL
TIMER
BLOCK DIAGRAM
TIO
INTBT
TI0/P13
PTO0/P20
TIMER/EVENT
COUNTER
#0
INTT0
BUZ/P23
WATCH
TIMER
INTW
PPO/P80
TIMER/
PULSE
GENELATOR
ROM
PROGRAM
MEMORY
32640
×
8
INTTPG
SI0/SB1/P03
SO0/SB0/P02
SCK0/P01
SERIAL
INTERFACE
INTCSI
10
4
f
X
/ 2
CLOCK
DIVIDER
SUB
MAIN
CLOCK
GENERATOR
STAND BY
CONTROL
N
SI1/P83
SO1/P82
SERIAL
INTERFACE
T0-T9
T10/S15/PH3/P153-
T13/S12/PH0/P150
FIP
CONTROLLER/
DRIVER
2
T14/S11/ P143-
T15/S10/P142
SCK1/P81
INT0/P10
CLOCK
OUTPUT
CONTROL
INT1/P11
INT2/P12
INTERRUPT
CONTROL
CPU CLOCK
Φ
10
8
S0/P120-S9/P141
S16/P100-S23/P113
V
LOAD
PORT 10-15
24
P100-P153
INT4/P00
PCL/P22
XT1 XT2 X1 X2
TI0
EVENT
COUNTER
AN0-AN3
AN4/P90-AN7/P93
8
AV
DD
AV
REF
AV
SS
A/D
CONVERTER
RESET V
DD
V
SS
V
PP
µ
PD75P238
BIT SEQ.
BUFFER(16)
µ
PD75P238
1. PIN FUNCTIONS
1.1
PORT PINS (1/2)
Pin Name
P00
P01
Input/Output
Dual-Function
Pin
INT4
SCK0
Function
8-Bit I/O
After Reset
Input/Output
Circuit Type*1
B
Input
P02
P03
P10
P11
Input
P12
P13
P20
P21
Input/output
P22
P23
PCL
BUZ
INT2
TI0
PTO0
—
SO0/SB0
SI0/SB1
INT0
INT1
4-bit input port (PORT0).
Internal pull-up resistor specification by
software is possible for P01 to P03 as a 3-
bit unit.
×
F –A
Input
F –B
M –C
With noise elimination
function
4-bit input port (PORT1).
Internal pull-up resistor specification by
software is possible as a 4-bit unit.
×
Input
B –C
4-bit input/output port (PORT2).
Internal pull-up resistor specification by
software is possible as a 4-bit unit.
×
Input
E–B
P30 to P33
*2
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.
N-ch open-drain 4-bit input/output port
(PORT4).
Data input/output pins for program memory
write/verify (low-order 4 bits).
×
Input
E–C
P40 to P43
*2
Input/output
—
Input
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
—
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.
Input
E–C
P70 to P73
Input/output
—
4-bit input/output port (PORT7).
Input
E
*
1.
A circle denotes Schmitt-triggerd input.
2.
Direct LED drive capability
5
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