GMS90X5XC Series | HYUNDAI MicroElectronics |
AC Characteristics for GMS90X5XC series (33MHz version)
VCC= 5V + 10%, −15%; VSS= 0V; TA= 0°C to 70°C
(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)
External Program Memory Characteristics
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| 33 MHz Oscillator | Variable Oscillator |
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| Parameter | Symbol | 1/tCLCL = 3.5 to 33MHz | Unit | |||||||||||
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| Min. | Max. | Min. | Max. |
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| ALE pulse width | tLHLL | 40 | - | - | ns | |||||||||||
| Address setup to ALE | tAVLL | 10 | - | - | ns | |||||||||||
| Address hold after ALE | tLLAX | 10 | - | - | ns | |||||||||||
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| ALE low to valid instruction in | tLLIV | - | 56 | - | ns | |||||||||||
| ALE to |
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| tLLPL | 15 | - | - | ns | ||
| PSEN |
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| pulse width | tPLPH | 80 | - | - | ns | ||||||||||
| PSEN | ||||||||||||||||
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| to valid instruction in | tPLIV | - | 35 | - | ns | ||||||||||
| PSEN | ||||||||||||||||
| Input instruction hold after |
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| tPXIX | 0 | - | 0 | - | ns | ||||||||
| PSEN |
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| Input instruction float after |
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| tPXIZ † | - | 20 | - | ns | ||||||||
| PSEN |
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| Address valid after |
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| tPXAV † | 25 | - | - | ns | |||||
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| Address to valid instruction in | tAVIV | - | 91 | - | ns | |||||||||||
| Address float to |
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| tAZPL | 0 | - | 0 | - | ns | |||
| PSEN |
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†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.
Jan. 2001 Ver 1.0 | 35 |
