EFM32WG880 Datasheet, PDF (52/85 Pages) Silicon Laboratories – Operation from backup battery when main power drains out

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Figure 3.41. EBI Read Enable Related Timing Requirements
EBI_A[N- 1:0]
EBI_AD[ 1 5 : 0 ]
EBI_CSn
EBI_REn
RDSETUP
(0, 1, 2, ...)
RDSTRB
(1, 2, 3, ...)
RDHOLD
(0, 1, 2, ...)
ADDR[ N: 1 ]
Z
Z
DATA[15:0]
Z
t _{SU_REn}
t _{H_REn}
Table 3.23. EBI Read Enable Related Timing Requirements
Symbol
Parameter
Min
t_{SU_REn} ^{1 2 3 4}
Setup time, from EBI_AD valid to trailing EBI_REn
edge
t_{H_Ren} ^{1 2 3 4}
Hold time, from trailing EBI_REn edge to EBI_AD
invalid
1_{Applies for all addressing modes (figure only shows D16A8).}
2_{Applies for both EBI_REn and EBI_NANDREn (figure only shows EBI_REn)}
3_{Applies for all polarities (figure only shows active low signals)}
4_{Measurement done at 10% and 90% of VDD (figure shows 50% of VDD)}
Figure 3.42. EBI Ready/Wait Related Timing Requirements
Typ Max Unit
37
ns
-1
ns
EBI_RDY
EBI_AD[ 1 5 : 0 ]
EBI_CSn
EBI_REn
RDSETUP
(0, 1, 2, ...)
RDSTRB
(1, 2, 3, ...)
Z
SYNC
(3 )
RDHOLD
(0, 1, 2, ...)
DATA[15:0]
t _{SU_ARDY}
t _{H_ARDY}
Table 3.24. EBI Ready/Wait Related Timing Requirements
Symbol
t_{SU_ARDY} ^{1 2 3 4}
Parameter
Setup time, from EBI_ARDY valid to trailing
EBI_REn, EBI_WEn edge
Min
Typ
37 + (3 * t_HFCORECLK)
Max
Unit
ns
2014-06-13 - EFM32WG880FXX - d0197_Rev1.40
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