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HMS87C1202A датащи(PDF) 39 Page - Hynix Semiconductor |
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HMS87C1202A датащи(HTML) 39 Page - Hynix Semiconductor |
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39 / 88 page ![]() 36 Apr. 2001 ver 1.0 HMS87C130XA/120XA/110XA 9.3 RC and RCIO registers RC is a 2-bit bidirectional I/O port (address C4H). Each pin can be set individually as input and output through the RCIO register (address C5H). Figure 9-4 Registers of Port RC PORT RBFUNC.4~0 Description RB4/ PWM0/ COMP0 0 RB4 (Normal I/O Port) 1 PWM0 Output / Timer1 Compare Output RB3/INT1 0 RB3 (Normal I/O Port) 1 External Interrupt Input 1 RB2/INT0 0 RB2 (Normal I/O Port) 1 External Interrupt Input 0 RB1/BUZ 0 RB1 (Normal I/O Port) 1 Buzzer Output RB0/AN0/ AVREF 01 1. When ANSEL0 = “0”, this port is defined for normal I/O port (RB0). When ANSEL0 = “1” and ADS2~0 = “000”, this port can be used Analog Input Port (AN0). RB0 (Normal I/O Port)/ AN0 (ANSEL0=1) 12 2. When this bit set to “1”, this port defined for AVREF, so it can not be used Analog Input Port AN0 and Normal I/O Port RB0. External Analog Reference Voltage - RC1 RC0 INPUT / OUTPUT DATA 0 : INPUT PORT 1 : OUTPUT PORT DIRECTION SELECT RC Data Register RC ADDRESS : C4H RESET VALUE : Undefined RC Direction Register RCIO ADDRESS : C5H RESET VALUE : ------00 - - --- -- --- - |
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