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參數(shù)資料
| 型號： | μPD789800 |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 1/48頁 |
| 文件大小： | 266K |
| 代理商： | ΜPD789800 |
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The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
1997
Document No. U12627EJ1V0DS00 (1st edition)
Date Published November 1998 J CP(K)
Printed in Japan
8-BIT SINGLE-CHIP MICROCONTROLLER
DATA SHEET
MOS INTEGRATED CIRCUIT
μ
PD789800
The mark
shows major revised points.
The
μ
PD789800 is a 78K/0S series product designed for a USB keyboard (for ASSP).
The
μ
PD789800 has on-chip hardware compatible with a USB keyboard, including USB (Universal Serial Bus)
functions, a regulator which powers a USB driver/receiver, and a key return signal detection circuit.
The
μ
PD78F9801, a product with on-chip flash memory which can operate on the same supply voltage as for
masked ROM products and various development tools are also under development.
Detailed descriptions of its functions, etc., are given in the following user's manuals. Be sure to read
them for design purposes.
μ
PD789800 Sub-Series User's Manual
78K/0S Series User's Manual, Instruction:
:
U12978E
U11047E
FEATURES
On-chip USB functions
Implements a USB (Universal Serial Bus) by connecting to Hub and Host.
Transfer speed: 1.5 Mbps (when the system clock operates at 6.0 MHz)
On-chip regulator
Controls the USB port voltage by using a bus power supply (V
REG
= 3.3
±
0.3 V) dedicated to the USB
driver/receiver.
On-chip ROM and RAM
Internal ROM
: 8K bytes
Internal high-speed RAM: 256 bytes
Minimum instruction execution time can be switched between high speed (0.33
μ
s) and low speed (1.33
μ
s)
(when the system clock operates at 6.0 MHz).
I/O port: 31
Serial interface: 2 channels
USB function
: 1 channel
Three-wire serial I/O mode: 1 channel
Timer: 3 channels
8-bit timer counter
:
1 channel
8-bit timer/event counter:
1 channel
Watchdog timer
:
1 channel
On-chip key return signal detection circuit
Supply voltage: V
DD
= 4.0 to 5.5 V
Operating ambient temperature: T
A
= -40
°
C to +85
°
C (when the USB is not operating)
T
A
= 0
°
C to +70
°
C (when the USB is operating)
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