HYUNDAI MicroElectronics GMS90X5XC Series
36 Jan. 2001 Ver 1.0

AC Characteristics for GMS90X5XC series (33MHz)

External Data Memory Characteristics

Advance Information (33MHz)

External Clock Drive
Parameter Symbol 33 MHz Oscillator Variable Oscillator
1/tCLCL = 3.5 to 33MHz Unit
Min. Max. Min. Max.
RD pulse width tRLRH 132 - 6tCLCL-50 - ns
WR pulse width tWLWH 132 - 6tCLCL-50 - ns
Address hold after ALE tLLAX2 10 - t CLCL-20 - ns
RD to valid data in tRLDV -81 -5t
CLCL-70 ns
Data hold after RD tRHDX 0- 0 - ns
Data float after RD tRHDZ -46 -2t
CLCL-15 ns
ALE to valid data in tLLDV -153 -8t
CLCL-90 ns
Address to valid data in tAVDV -183 - 9t
CLCL-90 ns
ALE to WR or RD tLLWL 71 111 3tCLCL-20 3tCLCL+20 ns
Address valid to WR or RD tAVWL 66 - 4tCLCL-55 - ns
WR or RD high to ALE high tWHLH 10 40 tCLCL-20 tCLCL+20 ns
Data valid to WR transition tQVWX 5-t
CLCL-25 - ns
Data setup before WR tQVWH 142 - 7tCLCL-70 - ns
Data hold after WR tWHQX 10 - tCLCL-20 - ns
Address float after RD tRLAZ -0 - 0ns
Parameter Symbol
Variable Oscillator
(Freq. = 3.5 to 24MHz) Unit
Min. Max.
Oscillator period tCLCL 30.3 285.7 ns
High time tCHCX 11.5 tCLCL - tCLCX ns
Low time tCLCX 11.5 tCLCL - tCHCX ns
Rise time tCLCH -5ns
Fall time tCHCL -5ns