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
93
10.4.6 Local Bus 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
T1
Address setup to falling edge of ALE
5
ns
T2
Address hold from falling edge of ALE
1
ns
T3
ALE Width
5
ns
T19
ALE falling edge to read enable
1
ns
T6
Data access time from read enable (1)
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
T9
Recovery Time to next ALE
5
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.
T3
T1
T9
T3
T1
T19
T8A
T16
T19
T2
T6
T7
T2
T6
T7
D0
D1
A0
A1
0ns
25ns
50ns
75ns
ALE
CS# & IOR#
LD[15:0]
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