ST90E30

The ST90E30 is EPROM member of the ST9 family of microcontroller, in windowed ceramic (E) and plastic OTP (T) packages respectively, completely developed and produced by SGS-THOMSON Microelectronics using a proprietary n-well HCMOS process.The EPROM parts are fully compatible with their ROM versions and this datasheet will thus provide only information specific to the EPROM based devices.Three memory spaces are available: Program Memory (internal and external), Data Memory (external) and the Register File, which includes the control and status registers of the on-chip peripherals.

Features of the ST90E30 are:(1)single chip microcontroller, 8K bytes of EPROM and 256 bytes of register file with 224 general purpose registers available as RAM accumulator or index pointers; (2)8/16 bit CORE with full feature DMA controller and powerful interrupt handler and a standard serial periaheral interface (SPI) handling S-BUS/I2C bus and IM bus; (3)up to 8 external interrupts edge selectable plus 1 non-maskable interrupt; (4)16 bit programmable Timer with 8 bit Prescaler,able to be used as a timer/watchdog for system integrity; (5)two 16 bit multifunction timer modules, each with an 8 bit prescaler and 13 operating modes, allowing simple use for complex waveform generation and measurement, PWM functions and many other system timing operations.

The absolute maximum ratings of the ST90E30 can be summarized as:(1)output voltage:Vss-0.3 to Vdd+0.3 V;(2)storage temperature range:-65 to 150;(3)supply voltage:-0.3 to 7V;(4)input voltage:Vss-0.3 to Vdd+0.3 V;(5)input voltage on Vpp pin:-0.3 to 13.5V.The memory of the ST90E3X is functionally divided into two areas, the Register File and Memory. The Memory may optionally be divided into two spaces,each having a maximum of 65,536 bytes. The two memory spaces are separated by function, one space for Program code, the other for Data. The ST90E3X 8K bytes of on-chip EPROM memory is selected at memory addresses 0 through 1 FFFh(hexadecimal) in the Program Space, while the ST90T30 OTP version has the top 64 bytes of the program space reserved by SGS-THOMSON for testing purposes.