S5935TFC AMCC [Applied Micro Circuits Corporation], S5935TFC Datasheet - Page 124
S5935TFC
Manufacturer Part Number
S5935TFC
Description
PCI Product
Manufacturer
AMCC [Applied Micro Circuits Corporation]
Datasheet
1.S5935TFC.pdf
(204 pages)
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S5935 – PCI Product
nv Memory Device Timing Requirements
For serial nv memory devices, the serial clock output
frequency is the PCI clock frequency divided by 512.
This is approximately 65 KHz (with a 33 MHz PCI
clock). Any serial memory device that operates at this
frequency is compatible with the S5935.
For byte-wide accesses, the S5935 generates the
waveforms shown in Figures 5 and 6. Figure 5 shows
an nv memory read operation. Figure 6 shows an nv
memory write operation. Read operations are always
the same length. Write operations, due to the charac-
teristics of reprogrammable nv memory devices, may
be controlled through a programming sequence.
Figure 68. nv Memory Read Operation
124
DS1527
EA[15:0]
EQ[7:0]
(OUTPUT)
(OUTPUT)
ERD#
(INPUT)
t
38
Address Valid
Memory Device Requirements for Read Accesses
t
36
Read cycle time
Address valid to data valid
Address valid to read active
Read active to data valid
Read pulse width
Data hold from read inactive
t
35
t
40
Data Valid
Timing
t
t
39
41
t
Revision 1.02 – June 27, 2006
37
AMCC Confidential and Proprietary
7T–10(max)
6T–10(max)
8T(max)
6T(max)
T(max)
Spec.
—
Data Book
T = 30 ns
240 ns
200 ns
170 ns
180 ns
30 ns
2 ns
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