HYUNDAI MicroElectronics GMS90X5XC Series
38 Jan. 2001 Ver 1.0

AC Characteristics for GMS90X5XC series (40MHz)

External Data Memory Characteristics

Advance Information (40MHz)

External Clock Drive
Parameter Symbol at 40 MHz Clock Variable Clock
1/tCLCL = 3.5 to 40MHz Unit
Min. Max. Min. Max.
RD pulse width tRLRH 120 - 6tCLCL-30 - ns
WR pulse width tWLWH 120 - 6tCLCL-30 - ns
Address hold after ALE tLLAX2 10 - tCLCL-15 - ns
RD to valid data in tRLDV -75 -5t
CLCL-50 ns
Data hold after RD tRHDX 0- 0 - ns
Data float after RD tRHDZ -38 -2t
CLCL-12 ns
ALE to valid data in tLLDV -150 -8t
CLCL-50 ns
Address to valid data in tAVDV -150 - 9t
CLCL-75 ns
ALE to WR or RD tLLWL 60 90 3tCLCL-15 3tCLCL+15 ns
Address valid to WR or RD tAVWL 70 - 4tCLCL-30 - ns
WR or RD high to ALE high tWHLH 10 40 tCLCL-15 tCLCL+15 ns
Data valid to WR transition tQVWX 5-t
CLCL-20 - ns
Data setup before WR tQVWH 125 - 7tCLCL-50 - ns
Data hold after WR tWHQX 5-t
CLCL-20 - ns
Address float after RD tRLAZ -0 - 0ns
Parameter Symbol
Variable Oscillator
(Freq. = 3.5 to 40MHz) Unit
Min. Max.
Oscillator period tCLCL 25 285.7 ns
High time tCHCX 10 tCLCL - tCLCX ns
Low time tCLCX 10 tCLCL - tCHCX ns
Rise time tCLCH -10ns
Fall time tCHCL -10ns