Hyundai GMS90X54C Explanation of the AC Symbols, External Program Memory Characteristics

Page 32

HYUNDAI MicroElectronics

GMS90X5XC Series

AC Characteristics

Explanation of the AC Symbols

Each timing symbol has 5 characters. The first character is always a ‘t’ (stand for time). The other characters, depending on their positions, stand for the name of a signal or the logical status of that signal. The following is a list of all the characters and what they stand for.

A:Address

C:Clock

D:Input Data

H:Logic level HIGH

I:Instruction (program memory contents)

L:Logic level LOW, or ALE

P:PSEN

Q:Output Data

R:RD signal

T:Time

V:Valid

W:WR signal

X:No longer a valid logic level

Z:Float

For example,

tAVLL = Time from Address Valid to ALE Low tLLPL = Time from ALE Low to PSEN Low

AC Characteristics for GMS90X5XC series (12MHz version)

VCC= 5V :VCC= 5V + 10%, − 15%; VSS= 0V; TA= 0°C to 70°C

(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)

VCC= 3.3V : VCC= 3.3V + 0.3V, − 0.6V; VSS= 0V; TA= 0°C to 70°C

(CL for port 0. ALE and PSEN outputs = 50pF; CL for all other outputs = 50pF)

Variable clock : Vcc = 5V : 1/tCLCL = 3.5 MHz to 12 MHz

Vcc = 3.3V : 1/tCLCL = 1 MHz to 12 MHz

External Program Memory Characteristics

12 MHz Oscillator

Variable Oscillator

Parameter

Symbol

1/tCLCL = 3.5 to 12MHz

Unit

Min.

Max.

Min.

Max.

ALE pulse width

tLHLL

127

-

2tCLCL-40

-

ns

Address setup to ALE

tAVLL

43

-

tCLCL-40

-

ns

Address hold after ALE

tLLAX

30

-

tCLCL-53

-

ns

ALE low to valid instruction in

tLLIV

-

233

-

4tCLCL-100

ns

ALE to

tLLPL

58

-

tCLCL-25

-

ns

PSEN

pulse width

tPLPH

215

-

3tCLCL-35

-

ns

PSEN

to valid instruction in

tPLIV

-

150

-

3tCLCL-100

ns

PSEN

Input instruction hold after

tPXIX

0

-

0

-

ns

PSEN

Input instruction float after

tPXIZ †

-

63

-

tCLCL-20

ns

PSEN

Address valid after

tPXAV †

75

-

tCLCL-8

-

ns

PSEN

Address to valid instruction in

tAVIV

-

302

-

5tCLCL-115

ns

Address float to

tAZPL

0

-

0

-

ns

PSEN

28	Jan. 2001 Ver 1.0

Image 32

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