HYUNDAI MicroElectronics GMS90X5XC Series
34 Jan. 2001 Ver 1.0

AC Characteristics for GMS90X5XC series (24MHz)

External Data Memory Characteristics

Advance Information (24MHz)

External Clock Drive
Parameter Symbol 24 MHz Oscillator Variable Oscillator
1/tCLCL = 3.5 to 24MHz Unit
Min. Max. Min. Max.
RD pulse width tRLRH 180 - 6tCLCL-70 - ns
WR pulse width tWLWH 180 - 6tCLCL-70 - ns
Address hold after ALE tLLAX2 15 - t CLCL-27 - ns
RD to valid data in tRLDV -118 -5t
CLCL-90 ns
Data hold after RD tRHDX 0- 0 - ns
Data float after RD tRHDZ -63 -2t
CLCL-20 ns
ALE to valid data in tLLDV -200 -8t
CLCL-133 ns
Address to valid data in tAVDV -220 -9t
CLCL-155 ns
ALE to WR or RD tLLWL 75 175 3tCLCL-50 3tCLCL+50 ns
Address valid to WR or RD tAVWL 67 - 4tCLCL-97 - ns
WR or RD high to ALE high tWHLH 17 67 tCLCL-25 tCLCL+25 ns
Data valid to WR transition tQVWX 5-t
CLCL-37 - ns
Data setup before WR tQVWH 170 - 7tCLCL-122 - ns
Data hold after WR tWHQX 15 - tCLCL-27 - ns
Address float after RD tRLAZ -0 - 0ns
Parameter Symbol
Variable Oscillator
(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 -12ns
Fall time tCHCL -12ns