TS80C52X2-VCKB datasheet(35/54 Pages) TEMIC

35 / 54 page

Rev. B - Jan. 25, 1999

Preliminary

TS80C52X2

8.2.3 Signature bytes

The TS80/87C52X2 contains 4 factory programmed signatures bytes. To read these bytes, perform the process

described in section 9.

8.3 EPROM Programming

8.3.1 Set-up modes

In order to program and verify the EPROM or to read the signature bytes, the TS87C52X2 is placed in specific

set-up modes (See Figure 11.).

Control and program signals must be held at the levels indicated in Table 33.

8.3.2 Definition of terms

Address Lines:P1.0-P1.7, P2.0-P2.4, P3.4, P3.5 respectively for A0-A12

Data Lines:P0.0-P0.7 for D0-D7

Control Signals:RST, PSEN, P2.6, P2.7, P3.3, P3.6, P3.7.

Program Signals:ALE/PROG, EA/VPP.

Table 20. EPROM Set-Up Modes

Mode

RST

PSEN

ALE/

PROG

EA/

VPP

P2.6

P2.7

P3.3

P3.6

P3.7

Program Code data

12.75V

Verify Code data

Program Encryption Array

Address 0-3Fh

12.75V

Read Signature Bytes

Program Lock bit 1

12.75V

Program Lock bit 2

12.75V

Program Lock bit 3

12.75V

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