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ST72774S7T1 Datasheet(PDF) 6 Page - STMicroelectronics |
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ST72774S7T1 Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 144 page ST72774/ST727754/ST72734 6/144 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST72774, ST72754 and ST72734 are HCMOS microcontroller units (MCU) from the ST727x4 family with dedicated peripherals for Monitor applications. They are based around an industry standard 8-bit core and offer an enhanced instruction set. The processor runs with an external clock at 12 or 24 MHz with a 5V supply. Due to the fully static design of this device, operation down to DC is possible. Under software control the ST727x4 can be placed in WAIT mode thus reducing power consumption. The HALT mode is no longer available. The enhanced instruction set and addressing modes afford real programming potential. Illegal opcodes are patched and lead to a reset. In addition to standard 8-bit data management the ST7 features true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes. The device includes an on-chip oscillator, CPU, System protection against illegal address jumps, Sync Processor for video timing & Vfback analysis, up to 60K Program Memory, up to 1K RAM, USB/ DMA, a Timing Measurement Unit, I/O, a timer with 2 input captures and 2 output compares, a 4- channel Analog to Digital Converter, DDC, I2C Single Master, Watchdog Reset, and eight 10-bit PWM/BRM outputs for analog DC control of external functions. Figure 1. ST727x4 Block Diagram VSS OSCIN OSCOUT RESET ADC DDC PORT C PORT D DAC (PWM) OSC VDD RAM PORT B PORT A PA1 PB6-PB7/AIN2-AIN3/PWM1-PWM2 PB3/SDAI PB2/SCLI PB1/SDAD PB0/SCLD PC1/AV PD6/CLAMPOUT POWER SUPPLY PB4-PB5/AIN0-AIN1 8-BIT CORE ALU CONTROL WATCHDOG Mode Selection :3 ROM/OTP/EPROM Up to 60K Bytes Up to 1K Bytes HSYNCI VSYNCI I2C USBVCC SYNC PROCESSOR PC0/HSYNCDIV PC2-PC7/PWM3-PWM8 PA2/VSYNCI2 TIMER PA0/OCMP1 TMU PD1/HSYNCO PD3/ITA/VFBACK PD4/ITB PD5/HFBACK PD0/VSYNCO PD2/CSYNCI USB USBDP USBDM PA3-PA6 PA7/BLANKOUT 3 |
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