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HMS87C1104A Datasheet(PDF) 12 Page - Hynix Semiconductor |
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HMS87C1104A Datasheet(HTML) 12 Page - Hynix Semiconductor |
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12 / 88 page  HMS87C130XA/120XA/110XA Apr. 2001 ver1.0 9 5. PIN FUNCTION VDD: Supply voltage. VSS: Circuit ground. RESET: Reset the MCU. XIN: Input to the inverting oscillator amplifier and input to the internal main clock operating circuit. XOUT: Output from the inverting oscillator amplifier. RA0~RA7: RA is an 8-bit, CMOS, bidirectional I/O port. RA pins can be used as outputs or inputs according to “1” or “0” written the their Port Direction Register(RAIO). In addition, RA serves the functions of the various special features in Table 5-1. RB0~RB4: RB is an 8-bit, CMOS, bidirectional I/O port. RB pins can be used as outputs or inputs according to “1” or “0” written the their Port Direction Register(RBIO). RB serves the functions of the various following special features in Table 5-2. RC0, RC1: RC is a 2-bit, CMOS, bidirectional I/O port. RC pins can be used as outputs or inputs according to “1” or “0” written the their Port Direction Register(RCIO). And these pins are not available in HMS87C1104(2)A. RD0~RD3: RD is a 4-bit, CMOS, bidirectional I/O port. RC pins can be used as outputs or inputs according to “1” or “0” written the their Port Direction Register(RDIO). And these pins are not available in HMS87C1204(2)A and HMS87C1104(2)A. Port pin Alternate function RA0 RA1 RA2 RA3 RA4 RA5 RA6 RA7 EC0 ( Event Counter Input Source ) AN1 ( Analog Input Port 1 ) AN2 ( Analog Input Port 2 ) AN3 ( Analog Input Port 3 ) AN4 ( Analog Input Port 4 ) AN5 ( Analog Input Port 5 ) AN6 ( Analog Input Port 6 ) AN7 ( Analog Input Port 7 ) Table 5-1 RA Port Port pin Alternate function RB0 RB1 1 RB2 RB3 1 RB4 1. These pins are not available in HMS87C1104(2)A. AN0 ( Analog Input Port 0 ) AVREF ( External Analog Reference Pin ) BUZ ( Buzzer Driving Output Port ) INT0 ( External Interrupt Input Port 0 ) INT1 ( External Interrupt Input Port 1 ) PWM0 (PWM0 Output) COMP0 (Timer1 Compare Output) Table 5-2 RB Port |
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