Hyundai GMS90X54C, GMS90X51C, GMS90X52C user manual Advance Information 24MHz External Clock Drive

Page 38

HYUNDAI MicroElectronics

GMS90X5XC Series

AC Characteristics for GMS90X5XC series (24MHz)

External Data Memory Characteristics

24 MHz Oscillator

Variable Oscillator

Parameter

Symbol

1/tCLCL = 3.5 to 24MHz

Unit

Min.

Max.

Min.

Max.

pulse width

tRLRH

180

-

6tCLCL-70

-

ns

RD

pulse width

tWLWH

180

-

6tCLCL-70

-

ns

WR

Address hold after ALE

tLLAX2

15

-

tCLCL-27

-

ns

to valid data in

tRLDV

-

118

-

5tCLCL-90

ns

RD

Data hold after

tRHDX

0

-

0

-

ns

RD

Data float after

tRHDZ

-

63

-

2tCLCL-20

ns

RD

ALE to valid data in

tLLDV

-

200

-

8tCLCL-133

ns

Address to valid data in

tAVDV

-

220

-

9tCLCL-155

ns

ALE to

or

tLLWL

75

175

3tCLCL-50

3tCLCL+50

ns

WR

RD

Address valid to

or

tAVWL

67

-

4tCLCL-97

-

ns

WR

RD

or

high to ALE high

tWHLH

17

67

tCLCL-25

tCLCL+25

ns

WR

RD

Data valid to

transition

tQVWX

5

-

tCLCL-37

-

ns

WR

Data setup before

tQVWH

170

-

7tCLCL-122

-

ns

WR

Data hold after

tWHQX

15

-

tCLCL-27

-

ns

WR

Address float after

tRLAZ

-

0

-

0

ns

RD

Advance Information (24MHz)

External Clock Drive

Variable Oscillator

Parameter

Symbol

(Freq. = 3.5 to 24MHz)

Unit

Min.

Max.

Oscillator period

tCLCL

41.7

285.7

ns

High time

tCHCX

12

tCLCL - tCLCX

ns

Low time

tCLCX

12

tCLCL - tCHCX

ns

Rise time

tCLCH

-

12

ns

Fall time

tCHCL

-

12

ns

34	Jan. 2001 Ver 1.0

Image 38

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 XTAL2Reset Symbol FunctionProgram Store Enable Pin NumberNo connection Address Latch EnableCircuit ground potential Block Diagram of the GMS90X5XC series Functional DescriptionCPU Special Function Register PSWSpecial Function Registers FFH D8H C0HD0H E0HF0H Contents of SFRs, SFRs in Numeric Order Address RegisterE0H D0HGF1 GF0 PDE Idle C8H T2CON TF2 EXF2 Rclk Tclk EXEN2 TR2 CP/RL2 X2 Mode Clock Generation DiagramMode Swithcing Waveforms Tmod Timer / Counter 0Timer/Counter 0 and 1 Operating Modes Description Input ClockP1.1 Remarks Input Clock TimerTimer/Counter 2 Operating Modes T2EXBaudrate Description Serial Interface UsartUsart Operating Modes 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