LS80C58 datasheet(22/23 Pages) INTEL

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8XC525458

Table 5 Program Lock Bits and the Features

Program Lock Bits

Protection Type

LB1

LB2

LB3

No Program Lock features enabled (Code verify will still be encrypted by the

Encryption Array if programmed)

MOVC instructions executed from external program memory are disabled from

fetching code bytes from internal memory EA is sampled and latched on

Reset and further programming of the EPROM is disabled

Same as 2 also verify is disabled

Same as 3 also external execution is disabled

NOTE

Any other combination of the lock bits is not defined

EPROM PROGRAMMING AND VERIFICATION CHARACTERISTICS

(TA e 21 Cto27 C VCC e 5V g20% VSS e 0V)

Symbol

Parameter

Min

Max

Units

VPP

Programming Supply Voltage

125

130

IPP

Programming Supply Current

1TCLCL

Oscillator Frequency

MHz

TAVGL

Address Setup to PROG Low

48TCLCL

TGHAX

Address Hold after PROG

48TCLCL

TDVGL

Data Setup to PROG Low

48TCLCL

TGHDX

Data Hold after PROG

48TCLCL

TEHSH

(Enable) High to VPP

48TCLCL

TSHGL

VPP Setup to PROG Low

TGHSL

VPP Hold after PROG

TGLGH

PROG Width

110

TAVQV

Address to Data Valid

48TCLCL

TELQV

ENABLE Low to Data Valid

48TCLCL

TEHQZ

Data Float after ENABLE

48TCLCL

TGHGL

PROG High to PROG Low

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