AM1808_11 Datasheet, PDF (103/262 Pages) Texas Instruments – AM1808 ARM Microprocessor

AM1808
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NO.
24 t_w(EMWEL)
25
t_{d(EMWAITH-EMWEH)}
26
t_{su(EMDV-EMWEL)}
27
t_{h(EMWEH-EMDIV)}
SPRS653C – FEBRUARY 2010 – REVISED DECEMBER 2011
Table 5-22. Switching Characteristics for EMIFA Asynchronous Memory Interface ^{(1) (2) (3)} (continued)
PARAMETER
EMA_WE active low width (EW = 0)
EMA_WE active low width (EW = 1)
Delay time from EMA_WAIT deasserted to EMA_WE high
Output setup time, EMA_D[15:0] valid to EMA_WE low
Output hold time, EMA_WE high to EMA_D[15:0] invalid
MIN
(WST)*E-3
(WST+(EWC*16))*E-3
3E-3
(WS)*E-3
(WH)*E-3
1.3V, 1.2V, 1.1V, 1.0V
Nom
(WST)*E
(WST+(EWC*16))*E
4E
(WS)*E
(WH)*E
MAX
(WST)*E+3
(WST+(EWC*16))*E+3
4E+3
(WS)*E+3
(WH)*E+3
UNIT
ns
ns
ns
ns
ns
EMA_CS[5:2]
3
1
EMA_BA[1:0]
EMA_A[22:0]
EMA_WE_DQM[1:0]
EMA_A_RW
4
8
6
EMA_OE
EMA_D[15:0]
10
12
1
5
9
7
13
EMA_WE
Figure 5-12. Asynchronous Memory Read Timing for EMIFA
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Peripheral Information and Electrical Specifications 103