AT89LS51 datasheet(21/32 Pages) ATMEL

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3053B–MICRO–3/05

AT89LS51

20. Serial Programming Characteristics

Figure 20-1. Serial Programming Timing

MOSI

MISO

SCK

OVSH

SHSL

SLSH

SHOX

SLIV

Table 20-1.

Serial Programming Characteristics, T

A = -40°C to 85°C, VCC = 2.7V - 4.0V (Unless Otherwise Noted)

Symbol

Parameter

Min

Typ

Max

Units

1/tCLCL

Oscillator Frequency

MHz

tCLCL

Oscillator Period

62.5

tSHSL

SCK Pulse Width High

8 tCLCL

tSLSH

SCK Pulse Width Low

8 t

CLCL

tOVSH

MOSI Setup to SCK High

tCLCL

tSHOX

MOSI Hold after SCK High

2 tCLCL

tSLIV

SCK Low to MISO Valid

tERASE

Chip Erase Instruction Cycle Time

500

tSWC

Serial Byte Write Cycle Time

64 tCLCL + 400

µs

21. Absolute Maximum Ratings*

Operating Temperature.................................. -55°C to +125°C

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age to the device. This is a stress rating only and

functional operation of the device at these or any

other conditions beyond those indicated in the

operational sections of this specification is not

implied. Exposure to absolute maximum rating

conditions for extended periods may affect

device reliability.

Storage Temperature ..................................... -65°C to +150°C

Voltage on Any Pin

with Respect to Ground .....................................-1.0V to +7.0V

Maximum Operating Voltage ............................................ 6.6V

DC Output Current...................................................... 15.0 mA

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