Hyundai GMS90X51C, GMS90X52C, GMS90X54C user manual Mode Swithcing Waveforms

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GMS90X5XC Series

HYUNDAI MicroElectronics

XTAL1
XTAL1:2
X2 bit
CPU Clock
STD Mode	X2 Mode	STD Mode

Figure 3. Mode Swithcing Waveforms

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Jan. 2001 Ver 1.0

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Image 21

Contents GMS90X51C GMS90X52C GMS90X54C Page Mask GMS90C51C Block DiagramGMS90C52C/54C GMS90L52C/54CLow voltage versions Plcc Pin Configuration top view PIN ConfigurationEA / VPP ALE / Prog Pdip Pin Configuration top viewMqfp Pin Configuration top view Logic Symbol XTAL2 PIN Definitions and FunctionsProgram Store Enable Symbol FunctionReset Pin NumberAddress Latch Enable Circuit ground potentialNo connection Functional Description Block Diagram of the GMS90X5XC seriesSpecial Function Register PSW CPUSpecial Function Registers D0H C0HFFH D8H E0HE0H Contents of SFRs, SFRs in Numeric Order Address RegisterF0H D0HGF1 GF0 PDE Idle C8H T2CON TF2 EXF2 Rclk Tclk EXEN2 TR2 CP/RL2 Clock Generation Diagram X2 ModeMode Swithcing Waveforms Timer/Counter 0 and 1 Operating Modes Description Timer / Counter 0Tmod Input ClockTimer/Counter 2 Operating Modes TimerP1.1 Remarks Input Clock T2EXUsart Operating Modes Serial Interface UsartBaudrate Description SM0 SM1Interrupt Request Sources Interrupt SystemInterrupt Priority-Within-Level Interrupt Source Power Saving Modes Absolute Maximum Ratings Electrical CharacteristicsDC Characteristics for GMS90C51C/52C/54C Parameter Symbol Limit Values Unit Test Conditions MinPower supply current Hyundai MicroElectronics VCC= 3.3V + 0.3V, -0.6V VSS=0V TA= 0C to 70C DC Characteristics for GMS90L51C/52C/54CExplanation of the AC Symbols AC Characteristics for GMS90X5XC series 12MHz versionExternal Program Memory Characteristics GMS90X5XC Series Advance Information 12MHz External Clock Drive AC Characteristics for GMS90X5XC series 16MHz version Advance Information 16MHz External Clock Drive AC Characteristics for GMS90X5XC series 24MHz version Advance Information 24MHz External Clock Drive AC Characteristics for GMS90X5XC series 33MHz version Advance Information 33MHz External Clock Drive AC Characteristics for GMS90X5XC series 40MHz version Advance Information 40MHz External Clock Drive External Program Memory Read Cycle External Data Memory Read Cycle AC Testing Input, Output Waveforms Oscillator Circuit 44PLCC Plastic Package P-LCC-44Plastic Package P-DIP-40 Plastic Package P-MPQF-44 GMS90X5XC Series ROM Protection GMS90X5XC-GC