GMS90X5XC Series HYUNDAI MicroElectronics
Jan. 2001 Ver 1.0 31

AC Characteristics for GMS90X5XC series (16MHz version)

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)
External Program Memory Characteristics
† Interfacing the GMS90X5XC series to devices with float times up to 35 ns is permissible. This limited bus contention will not
cause
any damage to port 0 Drivers.
Parameter Symbol 16 MHz Oscillator Variable Oscillator
1/tCLCL = 3.5 to 16MHz Unit
Min. Max. Min. Max.
ALE pulse width tLHLL 85 - 2tCLCL-40 - ns
Address setup to ALE tAVLL 23 - tCLCL-40 - ns
Address hold after ALE tLLAX 23 - tCLCL-40 - ns
ALE low to valid instruction in tLLIV -150 -4t
CLCL-100 ns
ALE to PSEN tLLPL 38 - tCLCL-25 - ns
PSEN pulse width tPLPH 153 - 3tCLCL-35 - ns
PSEN to valid instruction in tPLIV -88 -3t
CLCL-100 ns
Input instruction hold after PSEN tPXIX 0- 0 - ns
Input instruction float after PSEN tPXIZ †-43 - t
CLCL-20 ns
Address valid after PSEN tPXAV †55 - tCLCL-8 - ns
Address to valid instruction in tAVIV -198 -5t
CLCL-115 ns
Address float to PSEN tAZPL 0- 0 - ns