HYUNDAI MicroElectronics GMS90X5XC Series
30 Jan. 2001 Ver 1.0

AC Characteristics for GMS90X5XC series (12MHz)

External Data Memory Characteristics

Advance Information (12MHz)

External Clock Drive
Parameter Symbol 12 MHz Oscillator Variable Oscillator
1/tCLCL = 3.5 to 12MHz Unit
Min. Max. Min. Max.
RD pulse width tRLRH 400 - 6tCLCL-100 - ns
WR pulse width tWLWH 400 - 6tCLCL-100 - ns
Address hold after ALE tLLAX2 53 - tCLCL-30 - ns
RD to valid data in tRLDV -252 -5t
CLCL-165 ns
Data hold after RD tRHDX 0- 0 - ns
Data float after RD tRHDZ -97 -2t
CLCL-70 ns
ALE to valid data in tLLDV -517 -8t
CLCL-150 ns
Address to valid data in tAVDV -585 -9t
CLCL-165 ns
ALE to WR or RD tLLWL 200 300 3tCLCL-50 3tCLCL+50 ns
Address valid to WR or RD tAVWL 203 - 4tCLCL-130 - ns
WR or RD high to ALE high tWHLH 43 123 tCLCL-40 tCLCL+40 ns
Data valid to WR transition tQVWX 33 - tCLCL-50 - ns
Data setup before WR tQVWH 433 - 7tCLCL-150 - ns
Data hold after WR tWHQX 33 - tCLCL-50 - ns
Address float after RD tRLAZ -0 - 0ns
Parameter Symbol
Variable Oscillator
(Freq. = 3.5 to 12MHz) Unit
Min. Max.
Oscillator period (VCC=5V)
Oscillator period (VCC=3.3V) tCLCL
tCLCL
83.3
83.3 285.7
1ns
High time tCHCX 20 tCLCL - tCLCX ns
Low time tCLCX 20 tCLCL - tCHCX ns
Rise time tCLCH -20ns
Fall time tCHCL -20ns