Rainbow-electronics AT90LS4433 Bedienungsanleitung PDF herunterladen (Seite 97)

AT90S/LS4433

1042G–AVR–09/02

Serial Programming

Characteristics

Figure 68. Serial Programming Timing

Table 36. Serial Programming Characteristics, T

=-40°Cto85°C, V

=2.7-6.0V

(unless otherwise noted)

Symbol Parameter Min Typ Max Units

1/t

CLCL

Oscillator Frequency (V

= 2.7 - 6.0V) 0 4 MHz

CLCL

Oscillator Period (V

=2.7-6.0V) 250 ns

1/t

CLCL

Oscillator Frequency (V

= 4.0 - 6.0V) 0 8 MHz

CLCL

Oscillator Period (V

=4.0-6.0V) 125 ns

SHSL

SCK Pulse Width High 2 t

CLCL

SLSH

SCK Pulse Width Low 2 t

CLCL

OVSH

MOSI Setup to SCK High t

CLCL

SHOX

MOSI Hold after SCK High 2 t

CLCL

SLIV

SCK Low to MISO Valid 10 16 32 ns

Table 37. Minimum Wait Delay after the Chip Erase Instruction

Symbol 3.2V 3.6V 4.0V 5.0V

WD_ERASE

18 ms 14 ms 12 ms 8 ms

Table 38. Minimum Wait Delay after Writing a Flash or EEPROM Location

Symbol 3.2V 3.6V 4.0V 5.0V

WD_PROG

9ms 7ms 6ms 4ms

MOSI

MISO

SCK

OVSH

SHSL

SLSH

SHOX

SLIV

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 124 125

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