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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7293 датащи(PDF) 4 Page - STMicroelectronics |
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ST7293 датащи(HTML) 4 Page - STMicroelectronics |
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4 / 69 page  4/69 ST7294 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST7294 HCMOS Microcontroller Unit is a member of the ST7 family of Microcontrollers. The device is based on an industry-standard 8-bit core and features an enhanced instruction set. The CPU may be driven by an external 4MHz clock when the device is operated with a 5V supply, or by a 2MHz clock when operated with a 3V supply. Thanks to the fully static design, operation is pos- sible down to DC. Under software control, the ST7294 may be placed in either WAIT or HALT modes, thus reducing power consumption. The enhanced instruction set and addressing modes afford real programming potential. In addition to standard 8-bit data management, the ST7294 fea- tures true bit manipulation, 8x8 unsigned multipli- cation and indirect addressing modes. The device includes a CPU, ROM, RAM, EEPROM, I/O, an on-chip oscillator and a timer with input capture and dual output compare systems. Figure 2. ST7294 Block Diagram Note 1. EPROM version only CONTROL PORT A PORT B PORT C TIMER SYSTEM RAM 224 Bytes ROM or EPROM(1) 6144 kbytes PA0 - PA7 (8-Bit) PB0 - PB7 (8-Bit) PC0 - PC5 (6-Bit) V DD V SS OSCin OSCout INT/V PP (1) RESET OSCILLATOR POWER SUPPLY 8 -BIT CORE ALU VR01735E Internal CLOCK WATCHDOG EEPROM 256 Bytes |
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