User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 179
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to operation. Read and write signals are shown in Figure 14.5 (p. 179) and Figure 14.6 (p. 179)
respectively.
Figure 14.5. EBI Multiplexed 16-bit Data, 16-bit Address Read Operation
ADDR[16:1]
EBI_AD[15:0]
EBI_ALE
ADDRSETUP
(1, 2, 3, ...)
Z DATA[15:0]
EBI_CSn
EBI_REn
Z
RDSETUP
(0, 1, 2, ...)
RDSTRB
(1, 2, 3, ...)
RDHOLD
(0, 1, 2, ...)
Figure 14.6. EBI Multiplexed 16-bit Data, 16-bit Address Write Operation
ADDR[16:1]
EBI_AD[15:0]
EBI_ALE
ADDRSETUP
(1, 2, 3, ...)
DATA[15:0]
EBI_CSn
EBI_WEn
Z
WRSETUP
(0, 1, 2, ...)
WRSTRB
(1, 2, 3, ...)
WRHOLD
(0, 1, 2, ...)
ADDRHOLD
(0, 1, 2, ...)
14.3.3 Multiplexed 8-bit Data, 24-bit Address Mode
This mode allows 24-bit address with 8-bit data multiplexed on the EBI_AD lines. The upper 8 bits of
the EBI_AD lines are consecutively used for the highest 8 bits and the lowest 8 bits of the address. The
lower 8 bits of the EBI_AD lines are used for the middle 8 address bits and for data. This mode is set
by programming the MODE field in the EBI_CTRL register to D8A24ALE. Read and write signals are
shown in Figure 14.7 (p. 179) and Figure 14.8 (p. 180) respectively.
Figure 14.7. EBI Multiplexed 8-bit Data, 24-bit Address Read Operation
ADDR[23:16]
EBI_AD[15:8]
EBI_ALE
ADDRSETUP
(1, 2, 3, ...)
RDSETUP
(0, 1, 2, ...)
RDSTRB
(1, 2, 3, ...)
EBI_CSn
EBI_REn
Z
RDHOLD
(0, 1, 2, ...)
ADDR[15:8]
Z DATA[7:0] Z
EBI_AD[7:0]
ADDR[7:0]