Specification
NET2272 USB Peripheral Controller
______________________________________________________________________________
NetChip Technology, Inc., 2003
Patent Pending
335 Pioneer Way, Mountain View, California 94041
TEL (650) 526-1490
FAX (650) 526-1494
http://www.netchip.com
Rev 1.2, October 15, 2003
92
10.4.5 Local Bus Non-Multiplexed Read
Operating Conditions: VDDC: 2.2-2.6V, VDDIO: 3.2-3.5V, TA = 0°C to 70°C, Output Load = 25pF
NAME
DESCRIPTION
MIN
MAX
UNIT
T4
Address setup to read enable
-1
ns
T5
Address hold from end of read enable
-2
ns
T6
Data access time from LA valid or read enable
asserted (1), whichever is later
18
ns
T7
Data tri-state time from end of read enable
2
11
ns
T8A
Recovery Time to next read (2)
19
ns
T8B
Recovery Time to next write
19
ns
T16
Read Cycle Time
35
ns
(1) Read enable is the occurrence of both CS# and IOR#.
(2) Since reading and writing to EP_DATA cause EP_AVAIL and EP_TRANSFER to change values, it is
necessary to increase the recovery time to 37 nsec between a read or write to EP_DATA and a read from
EP_AVAIL or EP_TRANSFER.
T5
T5
T4
T4
T8A
T16
T6
T7
T6
T7
A0
A1
D0
D1
0ns
25ns
50ns
75ns
100ns
LA[4:0]
CS# & IOR#
LD[15:0]
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