2

TIMING PARAMETER

Symbol

Parameter

Min.

Max.

Unit

Trs

Level set up time

2

us

Tmcs

Mode code setup time

2

us

Tdsu

Data set up time

100

ns

Tdsh

Data hold time

100

ns

Tas

ACLK to byte select time

2

us

Tacpw

Address clock pulse width

2

us

Tppw

Program pulse width

100

us

Tps

Programming mode set up time

4

us

Toed

Output enable setup time

300

ns

Note : Segment ROM S1, S0 is programed just while 5 LSBs of ADDR are all 0.

Programming for security mode :

When programming in security mode, the waveform is just like above. The programming data is as below :

B11 ~ B1

B0

User defined

Security bit

Note : When security = 0, enable security;

When security = 1, disable security.

PROGRAMMING MODE

Mode

P13

P12

P11

Regular

0

0

0

Security

0

0

1

PIN ASSIGNMENT

API 820G

18 pin DIP

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

P1.2

P1.1

P1.0

GND

OSC

VPP

VO2

VO1

VDD

P1.3

P2.0

P2.1

P2.2

P2.3

P3.0

P3.1

P3.2

P3.3

API 820G