The F81218 mainly provides 4 pure UART and 2 SIR+UART ports through ISA or LPC interface which cab be selected by hardware setting. Each UART includes 16-byte send/receive FIFO, a programmable baud rate generator, complete modem control capability and an interrupt system. When using ISA interface mode, total 6 IRQ can be used, and each one supports sharing function. 2 address decoder pins are provided for ISA mode as well. When in LPC interface mode, some pins such as DATA pins, IOR, IOW, address decoder, ISA address A0-A3 can be simple LPC to ISA transferring bridge pins. And some other pins can be set to be GPIO pins.
No matter in ISA or LPC mode, one watch dog timer is provided for system controlling and the time interval can be programmed by register or hardware power on setting pin.
This IC needs one clock 24/48MHz input, and default is 24MHz. Powered by 3.3V voltage, the F81218 is in 100pin LQFP package (14mm x 14mm).
- FEATURES
- PACKAGE
- ATTACHMENTS
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Supports LPC or ISA interface (1 hardware setting pin to define LPC or ISA I/F )
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In LPC mode, also provides simple LPC to ISA bridge
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Totally provides 6 UART (16550 asynchronous) ports
- 4 pure UART ports
- 2 SIR+ UART ports
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Provides 6 IRQ and each one can be shared
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2 address decoder for ISA/LPC interface
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1 watch dog timer with WDTOUT# signal
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1 frequency input 24/48MHz
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100-LQFP(14mm x 14mm)