AT89C5131A-L_06 Datasheet, PDF (174/185 Pages) ATMEL Corporation – 8-bit Flash Microcontroller with Full Speed USB Device

Timings
Test conditions: capacitive load on all pins= 50 pF.
Table 128. SPI Interface Master AC Timing
V_DD = 2.7 to 5.5 V, T_A = -40 to +85°C
Symbol
Parameter
Min
Max
Unit
Slave Mode
T_CHCH
T_CHCX
T_CLCX
T_SLCH, T_SLCL
T_IVCL, T_IVCH
T_CLIX, T_CHIX
T_CLOV, T_CHOV
T_CLOX, T_CHOX
T_CLSH, T_CHSH
T_SLOV
T_SHOX
T_SHSL
T_ILIH
T_IHIL
T_OLOH
T_OHOL
Clock Period
Clock High Time
Clock Low Time
SS Low to Clock edge
Input Data Valid to Clock Edge
Input Data Hold after Clock Edge
Output Data Valid after Clock Edge
Output Data Hold Time after Clock Edge
SS High after Clock Edge
SS Low to Output Data Valid
Output Data Hold after SS High
SS High to SS Low
Input Rise Time
Input Fall Time
Output Rise time
Output Fall Time
Master Mode
2
0.8
0.8
100
50
50
50
0
0
2T_PER+120
4T_PER+20
2T_PER+100
2
2
100
100
T_PER
T_PER
T_PER
ns
ns
ns
ns
ns
ns
ns
ns
μs
μs
ns
ns
T_CHCH
Clock Period
4
T_PER
T_CHCX
Clock High Time
2T_PER-20
ns
T_CLCX
Clock Low Time
2T_PER-20
ns
T_IVCL, T_IVCH
Input Data Valid to Clock Edge
50
ns
T_CLIX, T_CHIX
Input Data Hold after Clock Edge
50
ns
T_CLOV, T_CHOV
Output Data Valid after Clock Edge
20
ns
T_CLOX, T_CHOX
Output Data Hold Time after Clock Edge
0
ns
Note:
T_PER is XTAL period when SPI interface operates in X2 mode or twice XTAL period when SPI inter-
face operates in X1 mode.
174 AT89C5131A-L
4338E–USB–06/06