AP160

Version 0.0

15

AMIC Technology, Inc.

PRGRAMMING AND VERIFY MODE AC WAVEFORMS

PROGRAM

VERIFY

VALID

DATA IN

DATA OUT

Hi-Z

VPP

VCC

LOGIC 1

LOGIC 0

VCC

VCC1

P2.7

ALE/PROG

VCC

EA/VPP

DATA

(PORT 0)

ADDRESS

(P1.0~P1.7

P2.0~P2.4)

Table 8. EPROM PROGRAMMING MODE

Mode

RST

PSEN

ALE/PROG EA/VPP

P2.6

P2.7

P3.6

P3.7

Write Code Data

H

L

12V

L

H

H

H

Read Code Data

H

L

H

H

L

L

H

H

Bit -1

H

L

12V

H

H

H

H

Bit -2

H

L

12V

H

H

L

L

Write Lock

Bit -3

H

L

12V

H

L

H

L

Read Signature Byte

H

L

H

H

L

L

L

L

Note: The signature bytes are read by the same procedure as a normal verification of locations 30H, 31H and 32H. The

values returns are as follows:

(30H) = 37H indicates manufactured by AMIC.

(31H) = 6EH indicates embedded OTP device.

(32H) = 7FH indicates JEDEC continuation code.