GMS97C2051

8-Bit CMOS Microcontorller GMS97C2051/L2051 Features
Compatible with MCS-51 Products
2 Kbytes of programmable EPROM
4.25V to 5.5V Operating Range (GMS97C2051) 2.70V to 3.6V Operating Range (GMS97L2051)
Version for 12MHz / 24 MHz Operating frequency (GMS97C2051) Only 12MHz Operating frequency (GMS97L2051)
Two-Level Program Memory Lock with encryption array
128 bytes SRAM
15 Programmable I/O Lines
Two 16-Bit Timer/Counters
Programmable serial USART
Five Interrupt Sources
Direct LED Drive Outputs
On-Chip Analog Comparator
Low Power Idle and Power Down Modes TM Description The GMS97C2051/L2051 is a high-performance CMOS 8-bit microcontroller with 2Kbytes of programmable EPROM. The device is compatible with the industry standard MCS-51TM instruction set and pinout. The HYUNDAI MicroElectronics GMS97C2051/L2051 is a powerful microcontroller which provides a highly flexible and cost effective solution to many embedded control applications. The GMS97C2051/L2051 provides the following standard features: 2Kbytes of EPROM, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the GMS97C2051/L2051 supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The Power Down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset. Pin Configuration PDIP/SOP RST (RXD) P3.0 (TXD) P3.1 XTAL2 XTAL1 ( INT0 )P3.2 ( INT1 ) P3.3 (T0) P3.4 (T1) P3.5 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 (AIN1) P1.0 (AIN0) P3.7 1 HYUNDAI MicroElectonics GMS97C2051/L2051 8-Bit CMOS Microcontroller Block Diagram VCC GND RAM ADDR RAM EPROM B REGISTER ACC STACK POINTER PROGRAM ADDRESS REGISTER TMP2 TMP1 BUFFER ALU INTERRUPT, SERIAL PORT AND TIMER BLOCKS PSW PC INCREMENTER PROGRAM COUNTER RST TIMING AND CONTROL INSTRUCTION REGISTER PORT 1 LATCH PORT 3 LATCH DPTR ANALOG COMPARATOR + _ OSC PORT 1 DRIVERS PORT 3 DRIVERS P1.0-P1.7 P3.0-P3.5 P3.7 HYUNDAI MicroElectronics 2 8-Bit CMOS Microcontorller GMS97C2051/L2051 Input to the inverting oscillator amplifier and input to the internal clock operating circuit. Pin Description Vcc Supply voltage. XTAL2 Output from the inverting oscillator amplifier. GND Ground. Recommended Oscillator Circuit XTAL1 and XTAL2 are the input and output, respectively, of an inverting amplifier which can be configured for use as an on-chip oscillator, as shown in Figure 1. To drive the device from an external clock source, XTAL2 should be left unconnected while XTAL1 is driven as shown in Figure 2. Oscillator Connections C2 XTAL2 Port 1 Port 1 is an 8-bit bidirectional I/O port. Port pins P1.2 to P1.7 provide internal pullups. P1.0 and P1.1 require external pullups. P1.0 and P1.1 also serve as the positive input (AIN0) and the negative input (AIN1), respectively, of the on-chip precision analog comparator. The Port 1 output buffers can sink 10mA and can drive LED displays directly. When 1s are written to Port1 pins, they can be used as inputs. When pins Figure 1. P1.2 to P1.7 are used as inputs and are externally pulled low, they will source current (IIL) because of the internal pullups. Port 1 also receives code data during EPROM programming and program verification. Port3 Port 3 pins P3.0 to P3.5, P3.7 are seven bidirectional C1 I/O pins with internal pullups. P3.6 is hard-wired as XTAL1 an input to the output of the on-chip comparator and is not accessible as a general purpose I/O pin. The Port 3 output buffers can sink 10mA. When 1s are written to Port 3 pins they are pulled high by the internal pullups and can be used as inputs. As inputs, Port 3 pins GND that are externally being pulled low will source current (IIL) because of the pullups. Port 3 also serves the functions of various special fea- Notes: C1, C2 = 30pF
10pF for Crystals ture of the GMS97C2051 as listed below: ( include stray capacitance ) Port Pin P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 Alternate Functions RXD ( serial input port ) TXD ( serial output port ) INT0 ( external interrupt 0 ) INT1( external interrupt 1 ) T0 ( timer 0 external input ) T1 ( timer 0 external input ) Figure 2. External Clock Drive Configuration NC XTAL2 Port 3 also receives some control signals for EPROM programming and programming verification. EXTERNAL OSCILLATOR SIGNAL XTAL1 RST Reset input. All I/O pins are reset to 1s as soon as RST goes high. Holding the RST pin high for two machine cycles while the oscillator is running resets the device. This pin is also receives the 12.75V programming supply voltage ( Vpp ) during EPROM programming. GND XTAL1 3 HYUNDAI MicroElectonics GMS97C2051/L2051 8-Bit CMOS Microcontroller Special Function Registers A map of the on-chip memory area called the Special Function Register (SFR) space is shown in the Table1, Table 2 and Table 3. Note that not all of the addresses are occupied, and unoccupied addresses may not be implemented on the chip. Read accesses to these addresses will in general return random data, and write accesses will have an indeterminate effect. User software should not write 1s to these unlisted locations, since they may be used in future products to invoke new features. In that case, the reset or inactive values of the new bits will always be 0. Table 1. 0F8H 0F0H 0E8H 0E0H 0D8H 0D0H 0C8H 0C0H 0B8H 0B0H 0A8H 0A0H 98H 90H 88H 80H GMS97C2051/L2051 SFR Map and Reset Values 0FFH B 00000000 0F7H 0EFH ACC 00000000 0E7H 0DFH PSW 00000000 0D7H 0CFH 0C7H IP XXX00000 P3 11111111 IE 0XX00000 0BFH 0B7H 0AFH 0A7H SCON 00000000 P1 11111111 TCON 00000000 SBUF XXXXXXXX 9FH 97H TMOD 00000000 SP 00000111 TL0 TL1 TH0 TH1 00000000 00000000 00000000 00000000 DPL DPH 00000000 00000000 8FH PCON 0XXX0000 87H HYUNDAI MicroElectronics 4 8-Bit CMOS Microcontorller Table 2. Bit Assignment of SFRs Address Register 81H 82H 83H 87H 88H 89H 8AH 8BH 8CH 8DH 90H 98H 99H A8H B0H B8H D0H E0H F0H SP DPL DPH PCON TCON TMOD TL0 TL1 TH0 TH1 P1 SCON SBUF IE P3 IP PSW ACC B CY AC F0 PS RS1 PT1 RS0 EA ES ET1 SM0 SM1 SM2 REN TB8 SMOD TF1 GATE TR1 C/ T TF0 M1 TR0 M0 GF1 IE1 GATE Bit7 Bit6 Bit5 Bit4 Bit3 GMS97C2051/L2051 Bit2 Bit1 Bit0 GF0 IT1 C/ T PD IE0 M1 IDLE IT0 M0 RB8 TI RI EX1 ET0 EX0 PX1 OV PT0 F1 PX0 P - : This Bit Location is reserved Bit manipulation is available Bit manipulation is not available 5 HYUNDAI MicroElectonics GMS97C2051/L2051 Table 3. SFR lists and their addresses Symbol * ACC *B DPH DPL * PSW SP * IE * IP * P1 * P3 * SCON SBUF * TCON TH0 TH1 TL0 TL1 * TMOD Name Accumulator B Register Data Pointer High Byte Data Pointer Low Byte Program Status Word Stack Pointer Interrupt Enable Control Interrupt Priority Control Port 1 Port 3 Serial Control Serial Data Buffer Timer/Counter Control Timer/Counter 0 High Bytes Timer/Counter 1 High Bytes Timer/Counter 0 Low Bytes Timer/Counter 1 Low Bytes Timer/Counter Mode Control *= 8-Bit CMOS Microcontroller Address E0H F0H 83H 82H D0H 81H A8H B8H 90H B0H 98H 99H 88H 8CH 8DH 8AH 8BH 89H Bit addressable SFR Timer/Counter 0 and 1 The GMS97C2051/L2051 has two 16-bit Timer/ Counter register : Timer0 and Timer1 . As a Timer, the register is incremented every machine cycle. Thus, the register counts machine cycle. Since a machine cycle consists of 12 oscillator periods, the count rate is 1/12 of the oscillator frequency. As a counter, the register is incremented in response to a 1-to-0 transition at its corresponding external input pin P3.4/T0 and P3.5/T1. Since 2 machine cycles Table 4. Timer / Counter 0 and 1 Operating Modes Mode Description Gate 0 1 2 8-bit Timer/Counter with 5-bit prescaler 16-bit timer/counter 8-bit Auto-Reload Timer/Counter (Timer 0) : TL0 is an 8-bit Timer/Counter controlled by the standard Timer 0 control bits, TH0 is an 8-bit Timer and is controlled by Timer 1 (Timer 1) : stop × × × are required to recognize a 1-to-0 transition, the maximum count rate is 1/24 of the oscillator frequency. External inputs P3.2/INT0 and 3.3/INT1 can be programmed to function as a gate to facilitate pulse width measurements. Timer/Counter 0 and 1 can be used in four operating modes as listed in Table 4. Figure 3 illustrates the input clock logic. TMOD C/T × × × M1 0 0 1 M0 0 1 0 3 × × 1 1 HYUNDAI MicroElectronics 6 8-Bit CMOS Microcontorller Figure 3. Time/Counter 0 and 1 Input Clock Logic fosc GMS97C2051/L2051
12 C/T TMOD fosc/12 P3.4/T0 P3.5/T1 max fosc/24 0 Timer 0/1 Input Clock 1 Control TR 0/1 TCON Gate TMOD P3.2/INT0 P3.3/INT1 =1 & 1 Serial Interface (USART) ble baud rates can be calculated using the formulas given in table 6. The serial port is full duplex, meaning it can transmit and receive simultaneously. And it can operate in four modes (one synchronous mode, three asynchronous mode) as illustrated in table 5. The possiTable 5. USART Operating Modes Mode 0 SCON SM0 SM1 0 0 Baud Rate fosc / 12 ( fixed ) Description Shift Register : Serial data enters and exits through RXD. TXD outputs the shift clock. Eight data bits are transmitted / received, with the LSB first. 8-bit UART : Ten bits are transmitted through TXD, or received through RXD a start bit (0), 8 data bits (LSB first), and a stop bit (1) 9-bit UART : Eleven bits are transmitted through TXD, or received through RXD a start bit (0), 8 data bits (LSB first), a programmable ninth data bit , and a stop bit (1) 9-bit UART : The same as Mode 2 except the variable baud rate. 1 0 1 Set by Timer ( variable )

2 1 0 fosc / 64 or fosc / 32 ( fixed ) 3 1 1 Set by Timer ( variable ) 7 HYUNDAI MicroElectonics GMS97C2051/L2051 Table 6. Formulas for calculating Baud rates Baud Rate generated from Oscillator Serial Port Mode 8-Bit CMOS Microcontroller Baud Rate 0 2 1,3 1,3 fosc / 12 SMOD x fosc) / 64 (2 (2 x Timer1 overflow rate) / 32 SMOD x fosc) / [32 x 12 x (256-TH1)] (2 SMOD Timer1 (Timer1 Mode2) Interrupt System be interrupted by any other interrupt source. If two requests of different priority levels are received simultaneously, the request of higher priority is serviced. If requests of the same priority level are received simultaneously, an internal polling sequence determines which request is serviced. Thus within each priority level there is a second priority structure determined by the polling sequence like Table 8. The GMS97C2051/L2051 provides 5 interrupt sources ( two external interrupts, two timer interrupts and serial port interrupt ) with two priority levels. Figure 4 gives a general overview of the interrupt sources and illustrates the request and control flags. A low-priority interrupt can itself be interrupted by a high-priority interrupt, but not by another low priority interrupt. A high-priority interrupt cannot Figure 4. Interrupt Request Sources
P3.2/ INT0 IT0 TCON.0 IE0 TCON.1 EX0 IE.0 PX0 IP.0 High Priority Low Priority Timer 0 Overflow TF0 TCON.5 ET0 IE.1 PT0 IP.1
P3.3/ INT1 IT1 TCON.2 IE1 TCON.3 EX1 IE.2 PX1 IP.2 Timer 1 Overflow TF1 TCON.7 ET1 IE.3 R1 PT1 IP.3 USART SCON.0 T1 SCON.1
1 ES IE.4 EA IE.7 PS IP.4 HYUNDAI MicroElectronics 8 8-Bit CMOS Microcontorller Table 7. Interrupt Sources and their corresponding Interrupt Vectors Interrupt External interrupt 0 Timer0 External Interrupt 1 Timer1 Serial Port Interrupt System Reset Source IE0 TF0 IE1 TF1 RI + TI RST Vector Address 0003H 000BH 0013H 001BH 0023H 0000H GMS97C2051/L2051 Table 8. Interrupt Priority-Within-Level Interrupt Source External interrupt 0 Timer0 interrupt External Interrupt 1 Timer1 interrupt Serial Port Interrupt IE0 TF0 IE1 TF1 RI + TI Priority Highest Lowest Restrictions on Certain Instructions The GMS97C2051/L2051 is an economical and costeffective member of HYUNDAI MicroElectronics growing family of microcontrollers. It contains 2Kbytes of EPROM program memory. It is fully compatible with the MCS-51 architecture, and can be programmed using the MCS-51 instruction set. However, there are a few considerations one must keep in mind when utilizing certain instructions to program this device. 1. Branching instructions: LCALL, LJMP, ACALL, AJMP, SJMP, JMP @A+DPTR These unconditional branching instructions will execute correctly as long as the programmer keeps in mind that the destination branching address must fall within the physical boundaries of the program memory size (locations 00H to 7FFH for the GMS97C2051/L2051). Violating the physical space limits may cause unknown program behavior. CJNE [...], DJNZ [...], JB, JNB, JC, JNC, JBC, JZ, JNZ With these conditional branching instructions the same rule above applies. Again, violating the memory boundaries may cause erratic execution. For applications involving interrupts the normal interrupt service routine address locations of the 80C51 family architecture have been preserved. 2. MOVX-related instructions, Data Memory: The GMS97C2051/L2051 contains 128 bytes of internal data memory. Thus, in the GMS97C2051/L2051 the stack depth is limited to 128 bytes, the amount of available RAM. External DATA memory access is not supported in this device, nor is external PROGRAM memory execution. Therefore, no MOVX [...] instructions should be included in the program. A typical 80C51 assembler will still assemble instructions, even if they are written in violation of the restrictions mentioned above. It is the responsibility of the controller user to know the physical features and limitations of the device being used and adjust the instructions used correspondingly. 9 HYUNDAI MicroElectonics GMS97C2051/L2051 8-Bit CMOS Microcontroller Idle Mode In idle mode, the CPU puts itself to sleep while all the on-chip peripherals remain active. The mode is invoked by software. The content of the on-chip RAM and all the special functions registers remain unchanged during this mode. The idle mode can be terminated by any enabled interrupt or by a hardware reset. P1.0 and P1.1 should be set to ‘0’ if no external pullups are used, or set to ‘1’ if external pullups are used. It should be noted that when idle is terminated by a hardware reset, the device normally resumes program execution, from where it left off, up to two machine cycles before the internal reset algorithm takes control. On-chip hardware inhibits access to internal RAM in this event, but access to the port pins is not inhibited. To eliminate the possibility of an unexpected write to a port pin when Idle is terminated by reset, the instruction following one that invokes Idle should not be one that writes to a port pin or to external memory. Power Down Mode GMS97C2051/L2051 have two power saving modes, Idle and Power Down. The bits PD and IDLE of the register PCON select the Power Down mode and the Idle mode, respectively. If 1s are written to PD and IDLE at the same time, PD takes precedence. Table 9 gives a general overview of the Power saving modes. In the Power Down mode of operation, VCC can be reduced to minimize power consumption. It must be ensured, however, that Vcc is not reduced before the Power Down mode is invoked, and that Vcc is restored to its normal operating level, before the Power Down mode is terminated. The reset signal that terminates the Power down mode also restarts the oscillator. The reset should not be activated before Vcc is restored to its normal operating level and must be held active long enough to allow the oscillator to restart and stabilize. ( similar to power-on reset ). Table 9. Power Saving Modes Overview Mode Idle mode Ex. instruction to enter ORL PCON, #01H To terminate Enabled interrupt, Hardware Reset Hardware Reset Remarks - CPU is gated off - CPU status registers maintain their data. - Peripherals are active - Oscillator stops - Contents of on-chip RAM and SFRs are maintained - Reset redefines all the SFRs but does not change the on-chip RAM Power-down Mode ORL PCON, #02H HYUNDAI MicroElectronics 10 8-Bit CMOS Microcontorller GMS97C2051/L2051 to the appropriate levels. Output data can be read at the port P1 pins. At this time P3.0 should not be changed. 8. To program a byte at the next address location, P3.0 level transition is needed to advance the internal address counter. Apply new data to the port P1 pins. 9. Repeat step 5 through 8, changing data and advancing the address counter for the entire 2K bytes array. Programming The EPROM The GMS97C2051/L2051 is programmed by using a modified Quick-Pulse ProgrammingTM algorithm. It differs from older methods in the value used for VPP (programming supply voltage) and in the width and number of the P3.2( PROG ) . The GMS97C2051/L2051 contains two signature bytes that can be read and used by an EPROM programming system to identify the device. The signature bytes identify the device as an manufactured by HME . Table 10 shows the logic levels for reading the signa- Program Verify : ture byte, and for programming the program memory, If lock bits LB1 and LB2 have not been programmed, the encryption table, and the security bits. The circuit code data can be read back via port P1 pins. configuration and waveforms for quick-pulse pro- 1. Set the internal address counter to 07FFH by bringing RST from ‘L’ to ‘H’ and reset the gramming are shown in Figures 5 and Figure 8. internal address counter to 0000H by bringing P3.0 Figure 6 shows the circuit configuration for normal from ‘H’ to ‘L’. program memory verification. 2. Apply the appropriate control signals for Read Code data to pins P3.3, P3.4, P3.5, P3.7 and read EPROM Programming and Verification the output data at the port P1 pins. 3. The P3.0 level transition is taken to advance the Internal Address Counter : internal address counter. The GMS97C2051/L2051 contains an internal EPROM 4. Read the next code data byte at the port P1 pins. address counter which is always set to 07FFH on the 5. Repeat step 3 and 4 until the entire array is read. rising edge of RST after setting P3.0 to ‘H’ and is advanced by applying continuous level transition to pin Program Memory Lock Bits P3.0. The two-level Program Lock system consists of 2 Lock Programming Algorithm : To program the GMS97C2051/L2051, the following bits and a 32-byte Encryption Array which are used to protect the program memory against software piracy. sequence is recommended. 1. Power-up Sequence Encryption Array : Apply power between VCC and GND pins with Within the EPROM array are 32 bytes of Encryption crystal oscillation. Array that are initially unprogrammed (all 1s). Every Set P3.0 to ‘H’. time that a byte is addressed during a verify, address Set RST to GND. lines are used to select a byte of the Encryption array. With all other pins floating, wait for greater than This byte is then exclusive-NORed (XNOR) with the 10ms. code byte, creating an Encrypted Verify byte. 2. Set pin RST to ‘H’ and pin P3.2 to ‘H’. The algorithm, with the array in the unprogrammed 3. Apply the appropriate combination of ‘H’ or ‘L’ state (all 1s), will return the code in its original, unlogic levels to pins P3.3, P3.4, P3.5, P3.7 to select modified form. It is recommended that whenever the one of the programming operations shown in the Encryption Array is used, at least one of the Lock Bits EPROM Programming Modes. (Table 10). be programmed as well. To program and verify the array 4. The P3.0 level is pulled ‘L’ and apply data for code byte at location 0000H to P1.0 to P1.7 5. Raise RST to 12.75V to enable pr ogramming. 6. The P3.2( PROG ) is pulsed low 10 times as shown in Figure 8. Each programming pulse is low for 100us(±10us) and high for a minimum of 10us. 7. To verify the programmed data, lower RST from 12.75V to logic ‘H’ level and set pins P3.3 to P3.7 11 HYUNDAI MicroElectonics GMS97C2051/L2051 Lock Bit Protection Modes Program Lock Bits LB1 1 2 3 U P P LB2 U U P Protection Type No program lock features. Further programming of the EPROM is disabled. Same as mode 2, also verify is disabled. 8-Bit CMOS Microcontroller Reading the Signature Bytes : The signature bytes are read by the same procedure as a normal verification of locations 000H and 001H, except that P3.5 and P3.7 need to be pulled to a logic low. Manufacturer ID: (00H) = E0H ( Indicates manufactured by HEI ) Device ID: (01H) = 26H ( Indicates GMS97C2051/L2051 ) U : unprogrammed, P : programmed EPROM Programming Modes Table 10. EPROM Programming Modes Mode Read Signature Program Code Data Verify Code Data Pgm encryption table Pgm encryption bit1 Pgm encryption bit RST 1 Vpp 1 Vpp Vpp Vpp 1 P3.2/ PROG 1 P3.3 0 0 0 0 1 1 P3.4 0 1 0 1 1 1 P3.5 0 1 1 0 1 0 P3.7 0 1 1 1 1 0 Notes:1. '0' = Valid low, '1' = Valid high for that pin. 2. Vpp = 12.75 V
0.25 V 3. Vcc = 5 V
10 % during programming and verification. 4. P3.2/ PROG receives 10 programming pulses while Vpp is held at 12.75V. Each programming pulse is low for 100uS (
10uS) and high for a minimum of 10uS. HYUNDAI MicroElectronics 12 8-Bit CMOS Microcontorller Figure 5. Programming the EPROM Memory GMS97C2051/L2051 Figure 6. Verifying the EPROM Memory GMS97C1051 P3.0 To Increment Address Counter PROG 5V GMS97C1051 P3.0 PGM DATA To Increment Address Counter 5V P3.2 P3.3 See EPROM Programming Modes Tables P3.4 P3.5 P3.7 XTAL1 4~6MHz VCC P1 5V VCC P1 PGM DATA P3.2 P3.3 See EPROM Programming Modes Tables P3.4 P3.5 P3.7 XTAL1 4~6MHz XTAL2 GND RST Vpp XTAL2 GND RST 5V EPROM Programming and Verification Characteristics Table 11. EPROM Programming and Verification Characteristics Parameter Programming Supply Voltage Programming Supply Current Oscillator Frequency Address Setup to PROG Low Data Setup to PROG Low Data Hold after PROG P3.4 ( ENABLE ) High to VPP VPP Setup to PROG Low VPP Hold After PROG PROG Width PROG High to PROG Low P3.4 ( ENABLE ) Low to Data Valid Data Float after P3.4 ( ENABLE ) Symbol VPP IPP 1 / tCLCL tAVGL tDVGL tGHDX tEHSH tSHGL tGHSL tGLGH tGHGL tELQV tEHQZ 0 4 48 tCLCL 48 tCLCL 48 tCLCL 48 tCLCL 10 10 90 10 48 tCLCL 48 tCLCL 110 us us us us Min 12.5 Max 13.0 50 6 Units V mA MHz TA= 21 to 27, VCC = 5.0
10% 13 HYUNDAI MicroElectonics GMS97C2051/L2051 8-Bit CMOS Microcontroller EPROM Programming and Verification Waveforms Figure 7. EPROM Programming and Verification Programming Verification VPP RST (VPP) tEHSH P3.2 (PROG) tGLGH tGHGL P3.4 (ENABLE) DATA IN tDVGL tGHDX tELQV DATA OUT tEHQZ tSHGL tGHSL LOGIC 1 LOGIC 0 PORT1 tAVGL P3.0 Address (N) Address (N+1) Figure 8. Programming Waveform 10 PULSES P3.2/ PROG 10 P3.2/ PROG
MIN 100
±10
HYUNDAI MicroElectronics 14 8-Bit CMOS Microcontorller GMS97C2051/L2051 Absolute Maximum Ratings Ambient temperature under bias (TA.)....................... - 40 Storage temperature (TST) ..... -65  to + 85  to + 150 Voltage on VCC pin with respect to Ground(VSS)...........-0.5V to 6.5V Voltage on any pin with respect to Ground(VSS)... -0.5V to VCC+0.5V Input Current on any pin during overload condition.........-10mA to +10mA Absolute sum of all input current during overload condition................... | 100 mA | NOTE : Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for longer periods may affect device reliability. During overload conditions (VIN > Vcc or VIN < Vss ) the voltage on Vcc pins with respect to ground (Vss) must not exceed the values defined by the absolute maximum ratings. 15 HYUNDAI MicroElectonics GMS97C2051/L2051 8-Bit CMOS Microcontroller D.C. Characteristics (5V Version) Vcc = 4.25V to 5.5V, GMS97C2051/C1051 Parameter Symbol Limit Values Min Input Low Voltage Input High Voltage (Except XTAL1, RST) Input High Voltage (XTAL1, RST) Output Low Voltage (ports 1,3) Output High Voltage (ports 1,3) Logical 0 Input Current (ports 1,3) Logical 1-to-0 Transition Current (ports 1,3) Input Leakage Current (Port P1.0, P1.1) Comparator Input Offset Voltage Comparator Input Common Mode Voltage Pin Capacitance Power supply current: Active mode, 12Mhz Idle mode, 12Mhz Active mode, 24Mhz Idle mode, 24Mhz Power Down mode CIO Icc Iccidle Icc Iccidle Ipd 10 20 12 30 15 100 pF mA mA mA mA uA Test Freq.=1MHz, TA=25 C Vcc=5.0V Vcc=5.0V, P1.0&P1.1=0 or Vcc Vcc=5.0V Vcc=5.0V, P1.0&P1.1=0 or Vcc Vcc=5.0V, P1.0&P1.1=0 or Vcc O Vss= 0V, TA= 0 C to 70 C O O for the Unit Test Condition Max 0.2Vcc-0.1 Vcc+0.5 Vcc+0.5 0.45 V V V V V VIL VIH VIH1 VOL VOH -0.5 0.5Vcc-0.1 0.7Vcc IOL=10mA,Vcc=5V IOH= -80uA, Vcc=5V±10% IOH= -30uA IOH= -12uA VIN=0.45V VIN=2V 0