beautypg.com

At89lv52, Flash programming and verification characteristics – Rainbow Electronics АТ89LV52 User Manual

Page 14

background image

AT89LV52

4-96

Figure 9. Programming the Flash Memory

Figure 10. Verifying the Flash Memory

Flash Programming and Verification Characteristics

T

A

= 0°C to 70°C, V

CC

= 5.0

±

10%

Note:

1. Only used in 12-volt programming mode.

VCC

V

CC

Symbol

Parameter

Min

Max

Units

V

PP

(1)

Programming Enable Voltage

11.5

12.5

V

I

PP

(1)

Programming Enable Current

25

µ

A

1/t

CLCL

Oscillator Frequency

3

12

MHz

t

AVGL

Address Setup to PROG Low

48t

CLCL

t

GHAX

Address Hold After PROG

48t

CLCL

t

DVGL

Data Setup to PROG Low

48t

CLCL

t

GHDX

Data Hold After PROG

48t

CLCL

t

EHSH

P2.7 (ENABLE) High to V

PP

48t

CLCL

t

SHGL

V

PP

Setup to PROG Low

10

µ

s

t

GHSL

(1)

V

PP

Hold After PROG

10

µ

s

t

GLGH

PROG Width

1

110

µ

s

t

AVQV

Address to Data Valid

48t

CLCL

t

ELQV

ENABLE Low to Data Valid

48t

CLCL

t

EHQZ

Data Float After ENABLE

0

48t

CLCL

t

GHBL

PROG High to BUSY Low

1.0

µ

s

t

WC

Byte Write Cycle Time

2.0

ms