Samsung 8-Bit CMOS Microcontroller, S3C9228/P9228 EI Enable Interrupts

S3C9228/P9228 SAM88RCRI INSTRUCTION SET

6-21

EI — Enable Interrupts

EI

Operation: SYM (2) ¨ 1

An EI instruction sets bit 2 of the system mode register, SYM.2 to "1". This allows interrupts to be

serviced as they occur. If an interrupt's pending bit was set while interrupt processing was

disabled (by executing a DI instruction), it will be serviced when you execute the EI instruction.

Flags: No flags are affected.

Format:

Bytes Cycles Opcode

(Hex)

opc 1 4 9F

Example: Given: SYM = 00H:

EI

If the SYM register contains the value 00H, that is, if interrupts are currently disabled, the

statement "EI" sets the SYM register to 04H, enabling all interrupts (SYM.2 is the enable bit for

global interrupt processing).

Contents

Main Page Important Notice Preface Page Table of Contents Part I Programming Model Chapter 1 Product Overview Chapter 2 Address Spaces Chapter 3 Addressing Modes Chapter 4 Control Registers Chapter 5 Interrupt Structure Chapter 6 SAM88RCRI Instruction Set Part II Hardware Descriptions Chapter 7 Clock Circuit Chapter 8 RESETRESET and Power-Down Chapter 9 I/O Ports Chapter 10 Basic Timer Chapter 11 Timer 1 Chapter 12 Watch Timer Chapter 13LCD Controller/Driver Chapter 1410-Bit A/D Converter Chapter 15Serial I/O Interface Table of Contents Page List of Figures Page Page List of Figures List of Tables Page List of Programming Tips Page List of Register Descriptions Page List of Instruction Descriptions 1 SAM88RCRI PRODUCT FAMILY S3C9228/P9228 MICROCONTROLLER OTP FEATURES Figure 1-1. Block Diagram 1-3 PIN ASSIGNMENTS Figure 1-2. S3C9228 44-QFP Pin Assignments Figure 1-3. S3C9228 42-SDIP Pin Assignments 1-5 PIN DESCRIPTIONS Page PIN CIRCUIT DIAGRAMS Figure 1-4. Pin Circuit Type B Figure 1-5. Pin Circuit Type C Figure 1-7. Pin Circuit Type E-4 Figure 1-8. Pin Circuit Type F-16A Figure 1-9. Pin Circuit Type H-23 Figure 1-10. Pin Circuit Type H-32 Figure 1-11. Pin Circuit Type H-32A Figure 1-12. Pin Circuit Type H-32B 2 PROGRAM MEMORY (ROM) Figure 2-1. S3C9228/P9228 Program Memory Address Space REGISTER ARCHITECTURE COMMON WORKING REGISTER AREA (C0HCFH) ++ PROGRAMMING TIP Addressing the Common Working Register Area SYSTEM STACK + + 3 Figure 3-1. Register Addressing Figure 3-2. Working Register Addressing Page Figure 3-4. Indirect Register Addressing to Program Memory Figure 3-5. Indirect Working Register Addressing to Register File INDIRECT REGISTER ADDRESSING MODE (Concluded) Figure 3-6. Indirect Working Register Addressing to Program or Data Memory Page INDEXED ADDRESSING MODE (Continued) Figure 3-8. Indexed Addressing to Program or Data Memory with Short Offset INDEXED ADDRESSING MODE (Concluded) Figure 3-9. Indexed Addressing to Program or Data Memory with Long Offset Page DIRECT ADDRESS MODE (Continued) Figure 3-11. Direct Addressing for Call and Jump Instructions Page 4 Page Page FLAGS Bit Identifier RESET RESET Value Read/Write Figure 4-1. Register Description Format ADCON A/D Converter Control Register D0H BTCON Basic Timer Control Register DCH CLKCON FLAGS INTPND1 Interrupt Pending Register 1 D6H INTPND2 Interrupt Pending Register 2 D7H LMOD LPOT OSCCON P0CON P0INT P0PUR P0EDGE P1CON P1INT P1PUR P1EDGE P2CON P2PUR P3CON P3INT P3PUR P3EDGE P4CONH P4CONL P5CONH P5CONL P6CON SIOCON SIO Control Register E1H STPCON SYM T A CON T B CON WTCON 5 Page Page Page Figure 5-3. S3C9228/P9228 Interrupt Structure Page 6 Page Page Page Page Page Page Page Page Page ADC Add With Carry ADD Add AND Logical AND CALL Call Procedure CCF Complement Carry Flag CLR Clear COM Complement CP Compare DEC Decrement DI Disable Interrupts EI Enable Interrupts IDLE Idle Operation INC Increment IRET Interrupt Return JP Jump JR Jump Relative Page Page Page Page LDCD/LDED Load Memory and Decrement LDCI/LDEI Load Memory and Increment NOP No Operation OR Logical OR POP Pop From Stack PUSH Push To Stack RCF Reset Carry Flag RET Return RL Rotate Left RLC Rotate Left Through Carry RR Rotate Right RRC Rotate Right Through Carry SBC Subtract With Carry SCF Set Carry Flag SRA Shift Right Arithmetic STOP Stop Operation SUB Subtract TCM Test Complement Under Mask TM Test Under Mask XOR 7 Page S3C9228/P9228 CLOCK CIRCUITS 7-3 Figure 7-6. System Clock Circuit Diagram Page Page Page + + Page 8 SYSTEM RESET POWER-DOWN MODES Page Page Page Page 9 Page Page Figure 9-2. Port 0 Control Register (P0CON) Figure 9-3. Port 0 Interrupt Control Register (P0INT) Figure 9-4. Port 0 Interrupt Pending Bits (INTPND1.3-.0) Figure 9-5. Port 0 Interrupt Edge Selection Register (P0EDGE) Figure 9-6. Port 0 Pull-up Control Register (P0PUR) Page Figure 9-8. Port 1 Interrupt Control Register (P1INT) Figure 9-9. Port 1 Interrupt Pending Bits (INTPND1.7-.4) Figure 9-10. Port 1 Interrupt Edge Selection Register (P1EDGE) Figure 9-11. Port 1 Pull-up Control Register (P1PUR) Page Figure 9-13. Port 2 Pull-up Control Register (P2PUR) Page Figure 9-15. Port 3 Interrupt Control Register (P3INT) Figure 9-16. Port 3 Interrupt Pending Bits (INTPND2.5-.4) Figure 9-17. Port 3 Interrupt Edge Selection Register (P3EDGE) Figure 9-18. Port 3 Pull-up Control Register (P3PUR) Page Page Page 10 Page Page Figure 10-2. Basic Timer Block Diagram 11 ONE 16-BIT TIMER MODE (TIMER 1) Page Figure 11-2. Timer 1 Block Diagram (One 16-bit Mode) 11-3 TWO 8-BIT TIMERS MODE (TIMER A and B) Page Figure 11-4. Timer B Control Register (TBCON) Page TIMER 1 S3C9228/P9228 Figure 11-5. Timer A Block Diagram(Two 8-bit Timers Mode) 11-8 Figure 11-6. Timer B Block Diagram (Two 8-bit Timers Mode) 11-9 Page 12 Page WATCH TIMER CIRCUIT DIAGRAM Figure 12-2. Watch Timer Circuit Diagram Page 13 LCD CIRCUIT DIAGRAM Figure 13-2. LCD Circuit Diagram Page Page Figure 13-5. LCD Port Control Register LCD VOLTAGE DIVIDING RESISTORS 1/5 Bias 1/4 Bias 1/3 Bias Figure 13-7. LCD Signal Waveforms (1/8 Duty, 1/4 Bias) LCD CONTROLLER/DRIVER S3C9228/P9228 Figure 13-8. LCD Signal Waveforms (1/4 Duty, 1/3 Bias) 13-8 Figure 13-9. LCD Signal Waveforms (1/3 Duty, 1/3 Bias) Page 14 FUNCTION DESCRIPTION Page Figure 14-3. A/D Converter Functional Block Diagram Page 15 Page Figure 15-2. SIO Prescaler Register (SIOPS) Figure 15-3. SIO Functional Block Diagram SIO BLOCK DIAGRAM SERIAL I/O TIMING DIAGRAM (SIO) Figure 15-4. Serial I/O Timing in Transmit/Receive Mode (Tx at falling, SIOCON.4 = 0) Figure 15-5. Serial I/O Timing in Transmit/Receive Mode (Tx at rising, SIOCON.4 = 1) 16 Page Page Page Page Page Page Page Figure 16-4. Input Timing for RESETRESET Figure 16-5. Serial Data Transfer Timing Page Page Page Figure 16-8. Operating Voltage Range Page 17 The S3C9228/P9228 microcontroller is currently available in a 42-pin SDIP and 44-pin QFP package. Figure 17-1. 42-SDIP-600 Package Dimensions 42-SDIP-600 44-QFP-1010B Figure 17-2. 44-QFP-1010B Package Dimensions 18 Figure 18-1. S3P9228 44-QFP Pin Assignments S3C9228 S3P9228 OTP S3C9228/P9228 Figure 18-2. S3P9228 42-SDIP Pin Assignments 18-2 Page Page Figure 18-3. Standard Operating Voltage Range Page 19 Figure 19-1. SMDS Product Configuration (SMDS2+) TB9228 Figure 19-2. TB9228 Target Board Configuration SM1347A Page Page Figure 19-3. Connectors (J101, J102) for TB9228 Figure 19-4. S3C9228 Probe Adapter for 42-SDIP Package Figure 19-5. S3C9228 Probe Adapter for 44-QFP Package Page 1 SAM88RCRI PRODUCT FAMILY S3C9228/P9228 MICROCONTROLLER OTP FEATURES Figure 1-1. Block Diagram 1-3 PIN ASSIGNMENTS Figure 1-2. S3C9228 44-QFP Pin Assignments Figure 1-3. S3C9228 42-SDIP Pin Assignments 1-5 PIN DESCRIPTIONS Page PIN CIRCUIT DIAGRAMS Figure 1-4. Pin Circuit Type B Figure 1-5. Pin Circuit Type C Figure 1-7. Pin Circuit Type E-4 Figure 1-8. Pin Circuit Type F-16A Figure 1-9. Pin Circuit Type H-23 Figure 1-10. Pin Circuit Type H-32 Figure 1-11. Pin Circuit Type H-32A Figure 1-12. Pin Circuit Type H-32B 2 PROGRAM MEMORY (ROM) Figure 2-1. S3C9228/P9228 Program Memory Address Space REGISTER ARCHITECTURE COMMON WORKING REGISTER AREA (C0HCFH) ++ PROGRAMMING TIP Addressing the Common Working Register Area SYSTEM STACK + + 3 Figure 3-1. Register Addressing Figure 3-2. Working Register Addressing Page Figure 3-4. Indirect Register Addressing to Program Memory Figure 3-5. Indirect Working Register Addressing to Register File INDIRECT REGISTER ADDRESSING MODE (Concluded) Figure 3-6. Indirect Working Register Addressing to Program or Data Memory Page INDEXED ADDRESSING MODE (Continued) Figure 3-8. Indexed Addressing to Program or Data Memory with Short Offset INDEXED ADDRESSING MODE (Concluded) Figure 3-9. Indexed Addressing to Program or Data Memory with Long Offset Page DIRECT ADDRESS MODE (Continued) Figure 3-11. Direct Addressing for Call and Jump Instructions Page 4 Page Page FLAGS Bit Identifier RESET RESET Value Read/Write Figure 4-1. Register Description Format ADCON A/D Converter Control Register D0H BTCON Basic Timer Control Register DCH CLKCON FLAGS INTPND1 Interrupt Pending Register 1 D6H INTPND2 Interrupt Pending Register 2 D7H LMOD LPOT OSCCON P0CON P0INT P0PUR P0EDGE P1CON P1INT P1PUR P1EDGE P2CON P2PUR P3CON P3INT P3PUR P3EDGE P4CONH P4CONL P5CONH P5CONL P6CON SIOCON SIO Control Register E1H STPCON SYM T A CON T B CON WTCON 5 Page Page Page Figure 5-3. S3C9228/P9228 Interrupt Structure Page 6 Page Page Page Page Page Page Page Page Page ADC Add With Carry ADD Add AND Logical AND CALL Call Procedure CCF Complement Carry Flag CLR Clear COM Complement CP Compare DEC Decrement DI Disable Interrupts EI Enable Interrupts IDLE Idle Operation INC Increment IRET Interrupt Return JP Jump JR Jump Relative Page Page Page Page LDCD/LDED Load Memory and Decrement LDCI/LDEI Load Memory and Increment NOP No Operation OR Logical OR POP Pop From Stack PUSH Push To Stack RCF Reset Carry Flag RET Return RL Rotate Left RLC Rotate Left Through Carry RR Rotate Right RRC Rotate Right Through Carry SBC Subtract With Carry SCF Set Carry Flag SRA Shift Right Arithmetic STOP Stop Operation SUB Subtract TCM Test Complement Under Mask TM Test Under Mask XOR 7 Page S3C9228/P9228 CLOCK CIRCUITS 7-3 Figure 7-6. System Clock Circuit Diagram Page Page Page + + Page 8 SYSTEM RESET POWER-DOWN MODES Page Page Page Page 9 Page Page Figure 9-2. Port 0 Control Register (P0CON) Figure 9-3. Port 0 Interrupt Control Register (P0INT) Figure 9-4. Port 0 Interrupt Pending Bits (INTPND1.3-.0) Figure 9-5. Port 0 Interrupt Edge Selection Register (P0EDGE) Figure 9-6. Port 0 Pull-up Control Register (P0PUR) Page Figure 9-8. Port 1 Interrupt Control Register (P1INT) Figure 9-9. Port 1 Interrupt Pending Bits (INTPND1.7-.4) Figure 9-10. Port 1 Interrupt Edge Selection Register (P1EDGE) Figure 9-11. Port 1 Pull-up Control Register (P1PUR) Page Figure 9-13. Port 2 Pull-up Control Register (P2PUR) Page Figure 9-15. Port 3 Interrupt Control Register (P3INT) Figure 9-16. Port 3 Interrupt Pending Bits (INTPND2.5-.4) Figure 9-17. Port 3 Interrupt Edge Selection Register (P3EDGE) Figure 9-18. Port 3 Pull-up Control Register (P3PUR) Page Page Page 10 Page Page Figure 10-2. Basic Timer Block Diagram 11 ONE 16-BIT TIMER MODE (TIMER 1) Page Figure 11-2. Timer 1 Block Diagram (One 16-bit Mode) 11-3 TWO 8-BIT TIMERS MODE (TIMER A and B) Page Figure 11-4. Timer B Control Register (TBCON) Page TIMER 1 S3C9228/P9228 Figure 11-5. Timer A Block Diagram(Two 8-bit Timers Mode) 11-8 Figure 11-6. Timer B Block Diagram (Two 8-bit Timers Mode) 11-9 Page 12 Page WATCH TIMER CIRCUIT DIAGRAM Figure 12-2. Watch Timer Circuit Diagram Page 13 LCD CIRCUIT DIAGRAM Figure 13-2. LCD Circuit Diagram Page Page Figure 13-5. LCD Port Control Register LCD VOLTAGE DIVIDING RESISTORS 1/5 Bias 1/4 Bias 1/3 Bias Figure 13-7. LCD Signal Waveforms (1/8 Duty, 1/4 Bias) LCD CONTROLLER/DRIVER S3C9228/P9228 Figure 13-8. LCD Signal Waveforms (1/4 Duty, 1/3 Bias) 13-8 Figure 13-9. LCD Signal Waveforms (1/3 Duty, 1/3 Bias) Page 14 FUNCTION DESCRIPTION Page Figure 14-3. A/D Converter Functional Block Diagram Page 15 Page Figure 15-2. SIO Prescaler Register (SIOPS) Figure 15-3. SIO Functional Block Diagram SIO BLOCK DIAGRAM SERIAL I/O TIMING DIAGRAM (SIO) Figure 15-4. Serial I/O Timing in Transmit/Receive Mode (Tx at falling, SIOCON.4 = 0) Figure 15-5. Serial I/O Timing in Transmit/Receive Mode (Tx at rising, SIOCON.4 = 1) 16 Page Page Page Page Page Page Page Figure 16-4. Input Timing for RESETRESET Figure 16-5. Serial Data Transfer Timing Page Page Page Figure 16-8. Operating Voltage Range Page 17 The S3C9228/P9228 microcontroller is currently available in a 42-pin SDIP and 44-pin QFP package. Figure 17-1. 42-SDIP-600 Package Dimensions 42-SDIP-600 44-QFP-1010B Figure 17-2. 44-QFP-1010B Package Dimensions 18 Figure 18-1. S3P9228 44-QFP Pin Assignments S3C9228 S3P9228 OTP S3C9228/P9228 Figure 18-2. S3P9228 42-SDIP Pin Assignments 18-2 Page Page Figure 18-3. Standard Operating Voltage Range Page 19 Figure 19-1. SMDS Product Configuration (SMDS2+) TB9228 Figure 19-2. TB9228 Target Board Configuration SM1347A Page Page Figure 19-3. Connectors (J101, J102) for TB9228 Figure 19-4. S3C9228 Probe Adapter for 42-SDIP Package Figure 19-5. S3C9228 Probe Adapter for 44-QFP Package