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

Instructions

An instruction consists of a sequence of specific

operations. Each received byte is sequentially de-

coded by the PSD MODULE and not executed as

a standard WRITE operation. The instruction is ex-

ecuted when the correct number of bytes are prop-

erly received and the time between two

consecutive bytes is shorter than the time-out pe-

riod. Some instructions are structured to include

READ operations after the initial WRITE opera-

tions.

The instruction must be followed exactly. Any in-

valid combination of instruction bytes or time-out

between two consecutive bytes while addressing

Flash memory resets the device logic into READ

Mode (Flash memory is read like a ROM device).

The Flash memory supports the instructions sum-

marized in Table 82., page 95:

Flash memory:

■ Erase memory by chip or sector

■ Suspend or resume sector erase

■ Program a Byte

■ RESET to READ Mode

■ Read Sector Protection Status

These instructions are detailed in Table 82. For ef-

ficient decoding of the instructions, the first two

bytes of an instruction are the coded cycles and

are followed by an instruction byte or confirmation

byte. The coded cycles consist of writing the data

AAh to address X555h during the first cycle and

data 55h to address XAAAh during the second cy-

cle. Address signals A15-A12 are Don’t Care dur-

ing the instruction WRITE cycles. However, the

appropriate Sector Select (FS0-FS3 or

CSBOOT0-CSBOOT1) must be selected.

The primary and secondary Flash memories have

the same instruction set. The Sector Select signals

determine which Flash memory is to receive and

execute the instruction. The primary Flash memo-

ry is selected if any one of Sector Select (FS0-

FS3) is High, and the secondary Flash memory is

selected if any one of Sector Select (CSBOOT0-

CSBOOT1) is High.

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