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BL0938

Shanghai Belling
Part Number BL0938
Manufacturer Shanghai Belling
Description Multi Rate Control IC
Published Sep 15, 2006
Detailed Description www.DataSheet4U.com BL0938 Multi-rate control IC Summarization BL0938 is a kind of 8-bit micro-control unit, which is...
Datasheet PDF File BL0938 PDF File

BL0938
BL0938

Overview
www.
DataSheet4U.
com BL0938 Multi-rate control IC Summarization BL0938 is a kind of 8-bit micro-control unit, which is high-performance and low-power, specially for power meter circuit.
It is made with CMOS process, including 4K Byte user ROM and 196K Byte user RAM.
It has many merits, such as low-power, high-integrated level, high reliability and etc.
It also has high-stability real-time clock and hardware watchdog inside the chip.
A serial port is included to meet the needs of infrared and gathering meter-record communication.
While applying to infrared mode, a 38K modulated wave is produced inside the chip.
Serial port RXD and TXD can be used to communicate with wire-carried wave in low voltage system, or make up gathering meter-record system by 485 port.
16 I/O ports can give users support of multi-path data processing function, or be used as general I/O ports.
The ability of resisting electromagnetic interference and radiation is powerful: ESD 4000V; fast pulse group 4000V.
BL0938 and BL2220R3, a 8-bit micro controller of Belling, are compatible in command system.
BL0938 is mostly used in multi-function power meter (including multi-rate, advance payment and gathering meter-record system) and other plug-in civil or industrial control system.
28pinPLCCpackage Feature Low power: asynchronous static chip design method, support STOP, WAIT power-save mode.
8-bit timer, with 7-bit pre-position.
Double crystal vibration circuit inside chip.
4MHz, used as timer of local system bus.
32.
768KHz, DataSheet4U.
com used as timer at the real time.
Two ways,8 I/O port in each (high-impedance as power-on, input mode).
Each port has programmable pull-on resistor.
Current in I/O port can drive standard TTL.
Hardware watchdog including.
8 interrupt sources: timer, software, outside, RTC, UART, low voltage, keyboard, watchdog.
One UART serial communication port.
Programmable real timer RTC, one or ten seconds interrupt can be produce.
Standard 5V working voltage.
Supply RTC by 3.
...


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