UPSD3212C-40U6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

UPSD3212C-40U6

Flash programmable system devices with 8032 MCU and USB and programmable logic

STMicroelectronics 

uPSD3212A, uPSD3212C, uPSD3212CV

Figure 71. External Program Memory READ Cycle

tLHLL

tLLPL

ALE

PSEN

PORT 0

PORT 2

tAVLL

tPLPH

tLLIV

tPLIV

tLLAX

A0-A7

tAZPL

tAVIV

A8-A11

INSTR

IN

tPXAV

tPXIZ

tPXIX

A0-A7

A8-A11

AI06848

Table 116. External Program Memory AC Characteristics (with the 5V MCU Module)

Symbol

Parameter(1)

40MHz Oscillator

Min

Max

Variable Oscillator

1/tCLCL = 24 to 40MHz

Unit

Min

Max

tLHLL

ALE pulse width

35

2tCLCL – 15

ns

tAVLL

Address set up to ALE

10

tCLCL – 15

ns

tLLAX

Address hold after ALE

10

tCLCL – 15

ns

tLLIV

ALE Low to valid instruction in

55

4tCLCL – 45 ns

tLLPL

ALE to PSEN

10

tCLCL – 15

ns

tPLPH

PSEN pulse width

60

3tCLCL – 15

ns

tPLIV

PSEN to valid instruction in

30

3tCLCL – 45 ns

tPXIX

Input instruction hold after PSEN

0

0

ns

tPXIZ(2) Input instruction float after PSEN

15

tCLCL – 10 ns

tPXAV(2) Address valid after PSEN

20

tCLCL – 5

ns

tAVIV

Address to valid instruction in

70

5tCLCL – 55 ns

tAZPL

Address float to PSEN

–5

–5

ns

Note: 1. Conditions (in addition to those in Table 109., page 133, VCC = 4.5 to 5.5V): VSS = 0V; CL for Port 0, ALE and PSEN output is 100pF;

CL for other outputs is 80pF

2. Interfacing the uPSD321x Devices to devices with float times up to 20ns is permissible. This limited bus contention does not cause

any damage to Port 0 drivers.

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