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STC12LE5608 Datasheet(PDF) 13 Page - STCmicro Technology Co,.Ltd |
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STC12LE5608 Datasheet(HTML) 13 Page - STCmicro Technology Co,.Ltd |
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13 / 377 page  1.6 STC12C5620AD series MCU Typical Application Circuit for ISP —— MCU should be connected to computer through RS-232 converter to download program 1.6.1 STC12C5620AD series MCU (28 pin) Typical Application Circuit for ISP 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Vcc Gnd T1OUT R1IN R1OUT T1IN T2IN R2OUT C1+ V+ C1- C2+ C2- V- T2OUT R2IN Reset U1-P1.0 U1-P1.1 MCU-VCC U1-P3.0 U1-P3.1 GND USB+5V T1OUT R1IN GND USB1 <33pF <33pF 1K 10μF Vcc 0.1μF 0.1μF 0.1μF Vcc + Vcc Gnd PC_RxD(COM Pin2) PC_TxD(COM Pin3) 2 3 5 PC COM MAX232,MAX3232,SP232,SP3232 10μF 10K C1 R1 + Vcc USB +5V SW1 Power On 10μF + 1K 0.1μF Download user procedure to STC MCU by the software STC-ISP programmer This circuit has been made as a STC12C5620AD series microcontroller ISP download programming tool Users are suggested stay this interface on the system , which can be convenient download the users program online. 28 Pin System Power If using internal R/C oscillator clock (4MHz ~ 8MHz, manufacturing error), XTAL1 and XTAL2 pin should be floated. If External clock frequency is higher than 33MHz, it is recommended to directly use external active crystals which clock are input from XTAL1 pin and XTAL2 pin must be floated. But R/C reset circuit is also suggest to reserve. When the frequency of crystal oscillator is lower than 20MHz, it is suggested not to use C1 and R1 replaced by 1K resistor connect to ground. 2 3 4 5 6 7 8 9 10 11 12 13 14 1 28 27 26 25 24 23 22 21 20 19 P3.2/INT0 P3.3/INT1 P3.4/T0/ECI P3.5/T1/PCA1/PWM1 Gnd VCC ADC7/SCLK/P1.7 ADC6/MISO/P1.6 ADC5/MOSI/P1.5 ADC4/SS/P1.4 ADC3/P1.3 ADC2/P1.2 CLKOUT1/ADC1/P1.1 CLKOUT0/ADC0/P1.0 PWM0/PCA0/P3.7 18 17 16 15 P2.2 P2.3 RST P3.0/RxD P3.1/TxD XTAL2 XTAL1 P2.4/PCA3/PWM3 P2.5 P2.1 PWM2/PCA2/P2.0 P2.7 P2.6 13 |
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