P89C664HFBD

The P89C664HFBD device contains a non-volatile 16KB/32KB/64KB Flash program memory that is both parallel programmable and serial In-System and In-Application Programmable. In-System Programming (ISP) allows the user to download new code while the microcontroller sits in the application.In-Application Programming (IAP) means that the microcontroller fetches new program code and reprograms itself while in the system. P89C664HFBD allows for remote programming over a modem link.A default serial loader (boot loader) program in ROM allows serial In-System Programming of the Flash memory via the UART without the need for a loader in the Flash code. For In-Application Programming, the user program erases and reprograms the Flash memory by use of standard routines contained in ROM.

The feature of the P89C664HFBD are:80C51 Central Processing Unit On-chip Flash program memory with In-System Programming(ISP) and In-Application Programming (IAP) capability Boot ROM contains low level Flash programming routines for downloading via the UART Can be programmed by the end-user application (IAP)Parallel programming with 87C51 compatible hardware interface to programmer Six clocks per machine cycle operation (standard)12 clocks per machine cycle operation (optional)Speed up to 20 MHz with 6 clock cycles per machine cycle (40 MHz equivalent performance); up to 33 MHz with 12 clocks per machine cycle Fully static operation RAM externally expandable to 64 kbytes Four interrupt priority levels Eight interrupt sources Four 8-bit I/O ports Full-duplex enhanced UART Framing error detection Automatic address recognition Power control modes Clock can be stopped and resumed Idle mode Power-Down mode Programmable clock out Second DPTR register Asynchronous port reset Low EMI (inhibit ALE) I2C serial interface Programmable Counter Array (PCA) PWM Capture/compare Well-suited for IPMI applications.

The absolute maximum ratings of the P89C664HFBD can be summarized as:(1)Operating temperature under bias :0 to +70 or 40 to +85 °C; (2)Storage temperature range: 65 to +150 °C; (3)Voltage on EA/VPP pin to VSS :0 to +13.0 V; (4)Voltage on any other pin to VSS :0.5 to +6.5 V; (5)Maximum IOL per I/O pin: 15 mA; (6)Power dissipation (based on package heat transfer limitations, not device power consumption) :1.5 W.

If you want to know more information about P89C664HFBD such as the electrical AC characteristics, please download the datasheet in www.seekdatasheet.com .