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PDF UPD75P308K Data sheet ( Hoja de datos )
| Número de pieza | UPD75P308K | |
| Descripción | 4-BIT SINGLE-CHIP MICROCOMPUTER | |
| Fabricantes | NEC | |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD75P308
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The µPD75P308 is a model of the µPD75308 equipped with a one-time PROM or EPROM instead of an
internal mask ROM.
Two types are available as the µPD75P308. The one-time PROM type is ideal for production of a small
quantity of many different types of application systems as data can only be written once to the one-time
PROM of this type. Programs can be written and rewritten to the built-in EPROM type making it ideal
for system evaluation.
Detailed functions are described in the followig user's manual. Be sure to read it for designing.
µPD75308 User's Manual: IEM-5016
FEATURES
• µPD75308 compatible
• Memory capacity
• Program memory (PROM): 8064 x 8 bits
• Data memory (RAM): 512 x 4 bits
• Can be connected to a pull-up resistor through software: Ports 0-3, 6, 7
• Open-drain input/output: Ports 4 and 5
• Single power source: 5V ± 5%
ORDERING INFORMATION
Part Number
µPD75P308GF-3B9
µPD75P308K
Package
80-pin plastic QFP (14 x 20 mm)
80-pin ceramic WQFN (LCC w/window)
Internal ROM
One-time PROM
EPROM
QUALITY GRADE
Part Number
µPD75P308GF-001-3B9
µPD75P308K
Package
80-pin plastic QFP (14 x 20 mm)
80-pin Ceramic WQFN (LCC w/window)
Quality Grade
Standard
Standard
5
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 function common to the one-time PROM and EPROM types of product is referred to as PROM throughout this document.
The information in this document is subject to change without notice.
Document No. IC-2472B
(O. D. No. IC-7208C)
Date Published November 1993 P
Printed in Japan
The mark 5 shows major revised points.
© NEC Corporation 1989
1 page  
µPD75P308
1. PIN FUNCTIONS
1.1 PORT PINS
Pin Name Input/Output
Also Served
As
Function
8-Bit I/O When Reset
P00 Input
INT4
P01 Input/Output
SCK
4-bit input port (PORT0)
Pull-up resistors can be specified in 3-bit
P02 Input/Output SO/SB0 units for the P01 to P03 pins by software.
P03 Input/Output SI/SBI
P10
P11
Input
P12
P13
INT0
INT1
INT2
TI0
With noise elimination function
4-bit input port (PORT1)
Internal pull-up resistors can be
specified in 4-bit units by software.
P20
P21 Input/Output
P22
PTO0
—
PCL
4-bit input/output port (PORT2)
Internal pull-up resistors can be
specified in 4-bit units by software.
P23
P30*2
P31*2
P32*2
P33*2
P40-43*2
P50-P53*2
Input/Output
Input/Output
Input/Output
BUZ
LCDCL MD0
SYNC MD1
MD2
MD3
—
—
Programmable 4-bit input/output port
(PORT3)
This port can be specified for input/output
in bit units.
Internal pull-up resistors can be
specified in 4-bit units by software.
N-ch open-drain 4-bit input/output port
(PORT4)
Data input/output pin for writing and
verifying of program memory (PROM)
(lower 4 bits)
N-ch open-drain 4-bit input/output port
(PORT5)
Data input/output pin for writing and
verifying of program memory (PROM)
(upper 4 bits)
P60
P61
Input/Output
P62
P63
KR0
KR1
KR2
KR3
Programmable 4-bit input/output port
(PORT6)
This port can be specified for input/output
in bit units.
Internal pull-up resistors can be specified
in 4-bit units by software.
P70 KR4
P71 KR5 4-bit input/output port (PORT7)
Input/Output
Internal pull-up resistors can be
P72 KR6 specified in 4-bit units by software.
P73 KR7
BP0 S24
BP1
Output
BP2
S25
S26
BP3 S27 1-bit output port (BIT PORT)
BP4 S28 Shared with a segment output pin.
BP5
Output
BP6
S29
S30
BP7 S31
X
X
X
X
q
q
X
Input
Input
Input
Input
High impedance
High impedance
Input
Input
*3
*1: Circles indicate schmitt trigger inputs.
2: Can directly drive LED.
3: For BP0-7, VLC1 indicated below are selected as the input source.
However, the output level is changed depending on BP0-7 and the VLC1 external circuits.
Input/
Output
Circuit
TYPE*1
B
F -A
F -B
M -C
B -C
E-B
E-B
M-A
M-A
F -A
F -A
G-C
5
5
5 Page 
µPD75P308
3. WRITING AND VERIFYING PROM (PROGRAM MEMORY)
The program memory of the µPD75P308 is a PROM of 8064 x 8 bits. To write data to or verify the contents
of this PROM, the pins listed in the table below are used. Note that no address input pins are provided
because the address is updated by the clock input through the X1 pin.
Pin Name
Function
VPP
X1, X2
MD0-MD3
Applies voltage when program memory is written/verified (normally, at VDD potential)
These pins input clock that updates address when program memory is written/verified. To X2 pin,
input signal 180º out of phase in respect to signal to X1 pin.
These pins select operation mode when program memory is written/verified.
P40-P43 (Lower 4)
These pins input/output 8-bit data when program memory is written/verified.
P50-P53 (Upper 4)
VDD Power supply voltage application pin.
Apply 5V ± 5% to this pin during normal operation and 6V when program memory is written/verified.
Note 1: Always cover the erasure window of the µPD75P308K with a light-opaque film except when the
contents of the program memory are erased.
2: The one-time PROM model µPD75P308GF is not equipped with a window and therefore, the
contents of the program memory of this model cannot be erased by exposing it to ultraviolet rays.
3.1 OPERATION MODES FOR WRITING/VERIFYING PROGRAM MEMORY
When +6V is applied to the VDD pin of the µPD75P308 with +12.5V applied to the VPP pin, the µPD75P308
is set in the program memory write/verify mode. In this mode, the following operation modes can be set
by using the MD0-MD3 pins. At this time, pull down the levels of all the other pins to VSS.
VPP
+12.5 V
Operating Mode Specification
VDD
MD0
MD1
MD2
HLH
L HH
+6 V
L LH
HxH
MD3
Operating Mode
L Program memory address 0 clear mode
H Write mode
H Verify mode
H Program inhibit mode
x: L or H
11
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