UPSD3212A-24T6T データシートの表示（PDF） - STMicroelectronics

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UPSD3212A-24T6T

Flash Programmable System Devices with 8032 MCU with USB and Programmable Logic

STMicroelectronics 

uPSD3212A, uPSD3212C, uPSD3212CV

Table 117. External Program Memory AC Characteristics (with the 3V MCU Module)

Symbol

Parameter(1)

24MHz Oscillator

Min

Max

Variable Oscillator

1/tCLCL = 8 to 24MHz

Unit

Min

Max

tLHLL

ALE pulse width

43

2tCLCL – 40

ns

tAVLL

Address set up to ALE

17

tCLCL – 25

ns

tLLAX

Address hold after ALE

17

tCLCL – 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

0

0

ns

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

Note: 1. Conditions (in addition to those in Table 110., page 133, VCC = 3.0 to 3.6V): VSS = 0V; CL for Port 0, ALE and PSEN output is 100pF,

for 5V devices, and 50pF for 3V devices; CL for other outputs is 80pF, for 5V devices, and 50pF for 3V devices)

2. Interfacing the uPSD321x Devices to devices with float times up to 35ns is permissible. This limited bus contention does not cause

any damage to Port 0 drivers.

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