Maxim DS87C530 Guia do Utilizador descarregar pdf (Página 37)

DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock

37 of 45

MOVX CHARACTERISTICS USING STRETCH MEMORY CYCLES (continued)

M2 M1 M0 MOVX CYCLES t

MCS

0 0 0 2 machine cycles 0

0 0 1 3 machine cycles (default) 4 t

CLCL

0 1 0 4 machine cycles 8 t

CLCL

0 1 1 5 machine cycles 12 t

CLCL

1 0 0 6 machine cycles 16 t

CLCL

1 0 1 7 machine cycles 20 t

CLCL

1 1 0 8 machine cycles 24 t

CLCL

1 1 1 9 machine cycles 28 t

CLCL

EXTERNAL CLOCK CHARACTERISTICS

PARAMETER SYMBOL MIN TYP MAX UNITS

Clock High Time t

CHCX

10 ns

Clock Low Time t

CLCX

10 ns

Clock Rise Time t

CLCL

5 ns

Clock Fall Time t

CHCL

5 ns

SERIAL PORT MODE 0 TIMING CHARACTERISTICS

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SM2 = 0, 12 clocks per cycle 12t

CLCL

Serial Port Clock Cycle

Time

XLXL

SM2 = 1, 4 clocks per cycle 4t

CLCL

SM2 = 0, 12 clocks per cycle 10t

CLCL

Output Data Setup to

Clock Rising

QVXH

SM2 = 1, 4 clocks per cycle 3t

CLCL

SM2 = 0, 12 clocks per cycle 2t

CLCL

Output Data Hold from

Clock Rising

XHQX

SM2 = 1, 4 clocks per cycle t

CLCL

SM2 = 0, 12 clocks per cycle t

CLCL

Input Data Hold after

Clock Rising

XHDX

SM2 = 1, 4 clocks per cycle t

CLCL

SM2 = 0, 12 clocks per cycle 11t

CLCL

Clock Rising Edge to

Input Data Valid

XHDV

SM2 = 1, 4 clocks per cycle 3t

CLCL

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