LAN9217-MT Standard Microsystems (SMSC), LAN9217-MT Datasheet - Page 122
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LAN9217-MT
Manufacturer Part Number
LAN9217-MT
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9217-MT.pdf
(139 pages)
Specifications of LAN9217-MT
Operating Supply Voltage (typ)
3.3V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
100
Lead Free Status / RoHS Status
Compliant
Available stocks
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Quantity
Price
Company:
Part Number:
LAN9217-MT
Manufacturer:
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LAN9217-MT
Manufacturer:
SMSC
Quantity:
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Revision 2.7 (03-15-10)
6.2
SYMBOL
t
t
t
t
cycle
t
t
t
csdv
t
t
csh
asu
don
doff
doh
csl
nCS, nRD
ah
A[7:1]
Data Bus
PIO reads can be used to access CSRs or RX Data and RX/TX status FIFOs. In this mode, counters
in the CSRs are latched at the beginning of the read cycle. Read data is valid as indicated in the timing
diagram. PIO reads can be performed using Chip Select (nCS) or Read Enable (nRD). Either or both
of these control signals must go high between cycles for the period specified.
Note: Some registers have restrictions on the timing of back-to-back, write-read and read-read
Note: The “Data Bus” width is 16 bits
Note: A PIO Read cycle begins when both nCS and nRD are asserted. The cycle ends when either
PIO Reads
DESCRIPTION
Read Cycle Time
nCS, nRD Assertion Time
nCS, nRD Deassertion Time
nCS, nRD Valid to Data Valid
Address Setup to nCS, nRD Valid
Address Hold Time
Data Buffer Turn On Time
Data Buffer Turn Off Time
Data Output Hold Time
cycles.
or both nCS and nRD are deasserted. They may be asserted and deasserted in any order.
Figure 6.1 PIO Read Cycle Timing
Table 6.3 PIO Read Timing
DATASHEET
16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX Support
122
MIN
45
32
13
0
0
0
0
TYP
MAX
30
7
SMSC LAN9217
Datasheet
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
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