![](http://datasheet.mmic.net.cn/370000/UPD780031AY_datasheet_16743890/UPD780031AY_1.png)
1999
DATA SHEET
DESCRIPTION
The
μ
PD780031AY, 780032AY, 780033AY, and 780034AY are members of the
μ
PD780034AY Subseries of the
78K/0 Series. This is a
μ
PD780034A Subseries product with an added multimaster-supporting I
2
C bus interface, and
is suitable for AV equipment applications.
A flash memory version, the
μ
PD78F0034AY, that can operate in the same power supply voltage range as the mask
ROM version, and various development tools, are available.
Detailed function descriptions are provided in the following user’s manuals. Be sure to read them before
designing.
μ
PD780024A, 780034A, 780024AY, 780034AY
Subseries User's Manual:
78K/0 Series User’s Manual Instructions:
U14046E
U12326E
FEATURES
Internal ROM and RAM
Item
Program Memory
(Internal ROM)
Data Memory
Package
Part Number
(Internal High-Speed RAM)
μ
PD780031AY
8 Kbytes
512 bytes
64-pin plastic shrink DIP (750 mils)
64-pin plastic QFP (14
×
14 mm)
64-pin plastic LQFP (12
×
12 mm)
μ
PD780032AY
16 Kbytes
μ
PD780033AY
24 Kbytes
1024 bytes
μ
PD780034AY
32 Kbytes
External memory expansion space: 64 Kbytes
Minimum instruction execution time: 0.24
μ
s (@ f
X
= 8.38-MHz operation)
I/O ports: 51 (5-V-tolerant N-ch open-drain: 4)
10-bit resolution A/D converter: 8 channels (AV
DD
= 1.8 to 5.5 V)
Serial interface: 3 channels (multimaster-supporting I
2
C bus mode, UART mode, 3-wire serial I/O mode)
Timer: 5 channels
Power supply voltage: V
DD
= 1.8 to 5.5 V
APPLICATIONS
Telephones, home electric appliances, pagers, AV equipment, car audios, office automation equipment, etc.
8-BIT SINGLE-CHIP MICROCONTROLLERS
Document No. U14045EJ1V0DS00 (1st edition)
Date Published August 1999 N CP(K)
Printed in Japan
MOS INTEGRATED CIRCUIT
μ
PD780031AY, 780032AY, 780033AY, 780034AY
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.