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uPSD3212A, uPSD3212C, uPSD3212CV
Table 117. External Program Memory AC Characteristics (with the 3V MCU Module)
Note: 1. Conditions (in addition to those in Table 110., page133, VCC = 3.0 to 3.6V ): VSS = 0V; CL for Port 0, ALE an d PSEN o utput is 100p F,
for 5V devices, and 50pF for 3V devices; CL for othe r outputs is 80pF, for 5V devices, and 50pF for 3V devices)
2. Interfacing the uPSD321x Devices to devices wi th float times up to 35ns is permissible. This limited bus content ion does not cause
any damage to Port 0 drivers.
Symbol Parameter(1) 24MHz Oscillato r Variable Oscillator
1/tCLCL = 8 to 24MHz Unit
Min Max Min Max
tLHLL ALE pulse width 43 2tCLCL – 40 ns
tAVLL Address set up to ALE 17 tCL CL – 25 ns
tLLAX Address hold after ALE 17 tCL CL – 25 ns
tLLIV ALE Low to valid instruction in 80 4tCLCL – 87 ns
tLLPL ALE to PSEN 22 tCLCL – 20 ns
tPLPH PSEN pulse width 95 3tCLCL – 30 ns
tPLIV PSEN to valid instruction in 60 3tCLCL – 65 ns
tPXIX Input instruction hold after PSEN 00ns
tPXIZ(2) Input instruction float after PSEN 32 tCLCL – 10 ns
tPXAV(2) Address valid after PSEN 37 tCLCL – 5 ns
tAVIV Address to valid instruction in 148 5tCLCL – 60 ns
tAZPL Address float to PSEN –10 –10 ns