Static ram write cycle, Wtwr = 0, During a 32-bit transfer, all four – Digi NS9750 User Manual
Page 833: Signals will go low. during a 16-bit transfer, two, Signal will go low, Figure 117: static ram write cycle, Wwen = 0
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w w w . d i g i e m b e d d e d . c o m
8 0 9
T i m i n g
Static RAM write cycle
Figure 117: Static RAM write cycle
WTWR = 0
WWEN = 0
During a 32-bit transfer, all four
byte_lane
signals will go low.
During a 16-bit transfer, two
byte_lane
signals will go low.
During an 8-bit transfer, only one
byte_lane
signal will go low.
Note:
1
If the PB field is set to 0, the
byte_lane
signals will function as write enable signals and the
we_n
signal
will always be high.
M22
M21
M24
M23
M22
M21
M20
M19
M18
M17
M16
M15
Note-1
CPU clock / 2
data<31:0>
addr<27:0>
st_cs_n<3:0>
we_n
byte_lane<3:0>
byte_lane[3:0] as WE*
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