Hyundai GMS90X54C, GMS90X51C, GMS90X52C user manual External Data Memory Read Cycle

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HYUNDAI MicroElectronics

GMS90X5XC Series

ALE
	tLHLL		tWHLH
			tWHLH
PSEN	tLLDV
	tLLDV
	tLLWL	tRLRH
RD
	tAVLL	tRLDV	tRHDZ
	tAVLL	tRLDV
	tLLAX2	tRLAZ	tRHDX
PORT 0	A0-A7 from		DATA IN	A0-A7 from PCL	INSTR. IN
PORT 0	RI or DPL		DATA IN	A0-A7 from PCL	INSTR. IN
	tAVWL
	tAVDV
PORT 2	P2.0-P2.7 or A8-A15 from DPH			A8-A15 from PCH

Figure 7. External Data Memory Read Cycle

ALE
tLHLL			tWHLH
			tWHLH
PSEN
	tLLWL	tWLWH
WR
tAVLL	tQVWX		tWHQX
	tLLAX2	tQVWH
		tQVWH
PORT 0	A0-A7 from	DATA OUT	A0-A7 from PCL	INSTR. IN
PORT 0	RI or DPL	DATA OUT	A0-A7 from PCL	INSTR. IN
	tAVWL
PORT 2	P2.0-P2.7 or A8-A15 from DPH		A8-A15 from PCH

Figure 8. External Data Memory Write Cycle

40	Jan. 2001 Ver 1.0

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Contents GMS90X51C GMS90X52C GMS90X54C Page Mask Block Diagram GMS90C51CGMS90C52C/54C GMS90L52C/54CLow voltage versions PIN Configuration Plcc Pin Configuration top viewPdip Pin Configuration top view EA / VPP ALE / ProgMqfp Pin Configuration top view Logic Symbol PIN Definitions and Functions XTAL2Symbol Function Program Store EnableReset Pin NumberNo connection Address Latch EnableCircuit ground potential Block Diagram of the GMS90X5XC series Functional DescriptionCPU Special Function Register PSWSpecial Function Registers C0H D0HFFH D8H E0HContents of SFRs, SFRs in Numeric Order Address Register E0HF0H D0HGF1 GF0 PDE Idle C8H T2CON TF2 EXF2 Rclk Tclk EXEN2 TR2 CP/RL2 X2 Mode Clock Generation DiagramMode Swithcing Waveforms Timer / Counter 0 Timer/Counter 0 and 1 Operating Modes DescriptionTmod Input ClockTimer Timer/Counter 2 Operating ModesP1.1 Remarks Input Clock T2EXSerial Interface Usart Usart Operating ModesBaudrate Description SM0 SM1Interrupt System Interrupt Request SourcesInterrupt Priority-Within-Level Interrupt Source Power Saving Modes Electrical Characteristics Absolute Maximum RatingsPower supply current DC Characteristics for GMS90C51C/52C/54CParameter Symbol Limit Values Unit Test Conditions Min Hyundai MicroElectronics DC Characteristics for GMS90L51C/52C/54C VCC= 3.3V + 0.3V, -0.6V VSS=0V TA= 0C to 70CExternal Program Memory Characteristics Explanation of the AC SymbolsAC Characteristics for GMS90X5XC series 12MHz version 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 Plastic Package P-LCC-44 44PLCCPlastic Package P-DIP-40 Plastic Package P-MPQF-44 GMS90X5XC Series GMS90X5XC-GC ROM Protection