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ST72T331N2T3S Datasheet(PDF) 5 Page - STMicroelectronics |
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ST72T331N2T3S Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 107 page 5/107 ST72E331 ST72T331 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST72T331 HCMOS Microcontroller Unit (MCU) is a member of the ST7 family. The device is based on an industry-standard 8-bit core and features an enhanced instruction set. The device is normally operated at a 16 MHz oscillator fre- quency. Under software control, the ST72T331 may be placed in either Wait, Slow 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 ST72T331 features true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes on the whole mem- ory. The device includes a low consumption and fast start on-chip oscillator, CPU, program memo- ry (OTP/EPROM versions), EEPROM, RAM, 44 (QFP64 and SDIP56) or 32 (QFP44 and SDIP42) I/O lines, a Low Voltage Detector (LVD) and the following on-chip peripherals: Analog-to-Digital converter (ADC) with 8 (QFP64, SDIP56) or 6 (QFP44, SDIP42) multiplexed analog inputs, in- dustry standard synchronous SPI and asynchro- nous SCI serial interfaces, digital Watchdog, two independent 16-bit Timers, one featuring an Exter- nal Clock Input, and both featuring Pulse Genera- tor capabilities, 2 Input Captures and 2 Output Compares (only 1 Input Capture and 1 Output Compare on Timer A). Figure 1. ST72T331 Block Diagram 8-BIT CORE ALU OSCIN OSCOUT RESET PORT B TIMER B PORT C SPI PORT E SCI PORT D 8-BIT ADC WATCHDOG PB0 -> PB7 PC0 -> PC7 PE0 -> PE7 PD0 -> PD7 OSC Internal CLOCK CONTROL RAM (384 - 512 Bytes) PORT F PF0 -> PF2,4,6,7 TIMER A PORT A PA0 -> PA7 VSSA VDDA (6 bits for ST72T331N) (6 bits) EEPROM (256 Bytes) AND LVD (2 bits for ST72T331J) (8 bits for ST72T331N) (6 bits for ST72T331J) (8 bits for ST72T331N) (5 bits for ST72T331J) (8 bits) (8 bits for ST72T331N) (5 bits for ST72T331J) VSS VDD POWER SUPPLY PROGRAM (8 - 16K Bytes) MEMORY 5 |
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