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EFM32LG880 Datasheet(PDF) 51 Page - Silicon Laboratories

Part # EFM32LG880
Description  Output state retention and wake-up from Shutoff Mode
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

EFM32LG880 Datasheet(HTML) 51 Page - Silicon Laboratories

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...the world's most energy friendly microcontrollers
2014-06-13 - EFM32LG880FXX - d0117_Rev1.30
51
www.silabs.com
Figure 3.40. EBI Read Enable Related Output Timing
EBI_BL[1:0]
RDSETUP
(0, 1, 2, ...)
EBI_A[27:0]
EBI_BL
EBI_A
EBI_AD[15:8]
ADDR[7:0]
EBI_CSn
EBI_AD[7:0]
EBI_REn
RDSTRB
(1, 2, 3, ...)
RDHOLD
(0, 1, 2, ...)
t SU_REn
t SU_REn
t SU_REn
t SU_REn
t WIDTH_REn
Z
Z
t H_REn
t H_REn
t H_REn
t H_REn
Z
Z
Z
DATA[7:0]
Table 3.22. EBI Read Enable Related Output Timing
Symbol
Parameter
Min
Typ
Max
Unit
tOH_REn 1 2 3 4
Output hold time, from trailing EBI_REn/
EBI_NANDREn edge to EBI_AD, EBI_A, EBI_CSn,
EBI_BLn invalid
-10.00 + (RDHOLD *
tHFCORECLK)
ns
tOSU_REn 1 2 3 4 5
Output setup time, from EBI_AD, EBI_A, EBI_CSn,
EBI_BLn valid to leading EBI_REn/EBI_NANDREn
edge
-10.00 + (RDSETUP
* tHFCORECLK)
ns
tWIDTH_REn 1 2 3 4 5 6
EBI_REn pulse width
-9.00 + ((RD-
STRB+1) * tHFCORE-
CLK)
ns
1Applies for all addressing modes (figure only shows D8A8. Output timing for EBI_AD only applies to multiplexed addressing
modes D8A24ALE and D16A16ALE)
2Applies for both EBI_REn and EBI_NANDREn (figure only shows EBI_REn)
3Applies for all polarities (figure only shows active low signals)
4Measurement done at 10% and 90% of V
DD (figure shows 50% of VDD)
5The figure shows the timing for the case that the half strobe length functionality is not used, i.e. HALFRE=0. The leading edge
of EBI_REn can be moved to the right by setting HALFRE=1. This decreases the length of tWIDTH_REn and increases the length
of tOSU_REn by 1/2 * tHFCLKNODIV.
6When page mode is used, RDSTRB is replaced by RDPA for page hits.


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