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Número de pieza UPD17P228MC-5A4
Descripción 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROLLER
Fabricantes NEC 
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD17P228
4-BIT SINGLE-CHIP MICROCONTROLLER
FOR SMALL GENERAL-PURPOSE INFRARED
REMOTE CONTROLLER
DESCRIPTION
The µPD17P228 is a model of the µPD17228 with a one-time PROM instead of an internal mask ROM.
Since the user can write programs to the µPD17P228, it is ideal for experimental production or small-scale
production of the µPD17225, 17226, 17227 or 17228 systems.
When reading this document, also read the documents related to the µPD17225, 17226, 17227 and 17228.
Detailed functions are described in the following user's manual. Read this manual when designing your system.
µPD172×× Series User's Manual: U12795E
FEATURES
• Pin compatible with µPD17225, 17226, 17227 and 17228 (except PROM programming function)
• Carrier generator circuit for infrared remote controller (REM output)
• 17K architecture: General-purpose register method
• Program memory (one-time PROM): 16 Kbytes (8192 × 16)
• Data memory (RAM): 223 × 4 bits
• Pull-up resistor can be connected to RESET pin
• Low-voltage detection circuit (WDOUT output)
• Supply voltage: VDD = 2.2 to 3.6 V (fx = 4 MHz: high-speed mode, 4 µs)
VDD = 3.0 to 3.6 V (fx = 8 MHz: high-speed mode, 2 µs)
APPLICATIONS
Preset remote controllers, toys, and portable systems
ORDERING INFORMATION
Part Number
µPD17P228MC-5A4
Package
30-pin plastic SSOP (7.62 mm (300))
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. U14542EJ1V0DS00 (1st edition)
Date Published April 2000 N CP(K)
Printed in Japan
©
2000

1 page




UPD17P228MC-5A4 pdf
µPD17P228
CONTENTS
1. DIFFRENCES AMONG µPD17225, 17226, 17227, 17228 AND µPD17P228 .......................... 6
2. PIN FUNCTIONS ..........................................................................................................................
2.1 Normal Operation Mode ....................................................................................................................
2.2 PROM Programming Mode ...............................................................................................................
2.3 Input/Output Circuits .........................................................................................................................
2.4 Processing of Unused Pins ..............................................................................................................
2.5 Notes on Using the RESET and INT Pins ........................................................................................
7
7
8
9
10
10
3. WRITING AND VERIFYING ONE-TIME PROM (PROGRAM MEMORY) ..............................
3.1 Operating Mode When Writing/Verifying Program Memory ..........................................................
3.2 Program Memory Writing Procedure ...............................................................................................
3.3 Program Memory Reading Procedure .............................................................................................
11
11
12
13
4. ELECTRICAL SPECIFICATIONS ................................................................................................ 14
5. PACKAGE DRAWING ................................................................................................................. 21
6. RECOMMENDED SOLDERING CONDITIONS .......................................................................... 22
APPENDIX. DEVELOPMENT TOOLS ............................................................................................... 23
Data Sheet U14542EJ1V0DS00
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UPD17P228MC-5A4 arduino
µPD17P228
3. WRITING AND VERIFYING ONE-TIME PROM (PROGRAM MEMORY)
The program memory of the µPD17P228 is a one-time PROM of 8192 × 16 bits.
To write or verify this one-time PROM, the pins shown in Table 3-1 are used. Note that no address input pin
is used. Instead, the address is updated by using the clock input from the CLK pin.
Table 3-1. Pins Used to Write/Verify Program Memory
Pin Name
VPP
VDD
CLK
MD0-MD3
D0-D7
Function
Supplies voltage when writing/verifying program memory.
Apply +12.5 V to this pin.
Power supply.
Supply +6 V to this pin when writing/verifying program memory.
Inputs clock to update address when writing/verifying program memory.
By inputting pulse four times to CLK pin, address of program memory is updated.
Input to select operation mode when writing/verifying program memory.
Inputs/outputs 8-bit data when writing/verifying program memory.
3.1 Operating Mode When Writing/Verifying Program Memory
The µPD17P228 is set in the program memory write/verify mode when +6 V is applied to the VDD pin and +12.5
V is applied to the VPP pin after the µPD17P228 has been in the reset status (VDD = 5 V, RESET = 0 V) for a specific
time. In this mode, the operating modes shown in Table 3-2 can be set by setting the MD0 through MD3 pins. Leave
all the pins other than those shown in Table 3-1 unconnected or connect them to GND via pull-down resistor
(470 ). (Refer to PIN CONNECTION (2) PROM programming mode.)
Table 3-2. Setting Operation Mode
VPP
+12.5 V
VDD
+6 V
Setting of Operating Mode
MD0
MD1
HL
LH
LL
H×
MD2
H
H
H
H
×: don’t care (L or H)
Operating Mode
MD3
L Program memory address 0 clear mode
H Write mode
H Verify mode
H Program inhibit mode
Data Sheet U14542EJ1V0DS00
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