TK80H51 250ºC Microcontroller
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The TK80H51 family, based on the 8051 architecture, is designed to work in high temperature environments up to 250ºC. The E (Enhanced) version of the 80H51 provides a non-multiplexed address and data bus, the 8-bit ADC, three additional parallel ports, and the SPI port.
The enhanced version also supports a RAM-based bootstrap mode, allowing for the downloading of RAM based programs into an existing system. In the bootstrap mode, the 256 bytes of XRAM are re-mapped from the data space into the program space. The ROM-based bootstrap program receives 256 bytes serially, and stores them in the RAM. After the user program has been received, the bootstrap program jumps to the RAM for further operation.
The TK80H51 family is made on an SOI process, using tungsten interconnect. This technology is what allows the TK80H51 to operate at 250ºC operation.
In the 83Hxx series, the internal 8K masked ROM provides a permanent program storage that will not degrade with temperature. As with all 8051 family members, the internal storage can be augmented with external program storage.
The TK8xH51x family contains seven 8 bit bidirectional parallel ports, two external interrupt sources, three timer/counters, a serial port with a hardware interrupt capability and a frame error detect flag, power management, a programmable counter array (PCA), an 8-bit, 8-chanel ADC, and a SPI port. These peripherals are supported by a multiple source, four level interrupt capability. The core processor contains 256 bytes of scratchpad RAM and another 256 bits of XRAM that can be used as program storage.
The TK8xH51x family members mainly differ by the amount of embedded memory, and whether the package has enough pins to support the new embedded peripherals.