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EM6812F2TP24B 数据表(PDF) 34 Page - EM Microelectronic - MARIN SA |
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EM6812F2TP24B 数据表(HTML) 34 Page - EM Microelectronic - MARIN SA |
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34 / 81 page  R EM6812 Copyright © 2005, EM Microelectronic-Marin SA 34 www.emmicroelectronic.com 10 Port A 10.1 Basic features The port A is an 8-bit general-purpose input/output port. The CPU can read the input state in all modes. All selections concerning the port A are bit-wise executable: Bit-wise executable on PA[0] to PA[7]: • Input / Output selection • CMOS or NCH Open Drain Outputs • Interrupt with rising or falling edge selection, direct or debounced. • Pull resistor selection. Pull-up or Pull-down. When both are selected, pull-up has the priority. Special features • Input reset and wakeup capabilities on input pattern or single pin • External system clock input on PA[4] or PA[5] • RC Oscillation Loop on PA[6] , PA[4] • Timer clock and start stop inputs. • Dual Port Ram Control signals on PA[0] to PA[3] Table 29. Port A External Connectivity Port A input connectivity PA output Always active Enable with corresponding Timer configuration bits PA input External Interrupt External system clock Oscillati on Loop Dual Port RAM Timer1 Timer2 Timer3 Timer4 Output drive PA[7] IRQPA[7] Start[7] Start[7] Start[7] Start[7] Clk[1] Drive 2 PA[6] IRQPA[6] RCOut Start[6] Start[6] Start[6] Clk[1] Start[6] Drive 2 PA[5] IRQPA[5] ExtClk1 Start[5] Start[5] Clk[1] Start[5] Start[5] Drive 1 PA[4] IRQPA[4] ExtClk1 RCIn Start[4] Clk[1] Start[4] Start[4] Start[4] Drive 1 PA[3] IRQPA[3] ExtAdr[1] Start[3] Start[3] Start[3] Clk[0] Drive 1 PA[2] IRQPA[2] ExtAdr[0] Start[2] Start[2] Clk[0] Start[3] Drive 1 PA[1] IRQPA[1] ExtWEn Start[1] Clk[0] Start[2] Start[2] Drive 1 PA[0] IRQPA[0] ExtCEn Clk[0] Start[1] Start[1] Start[1] Drive 1 These input connections remain active also if the corresponding terminal is configured as output. |
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