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
95
10.4.8 Local Bus Multiplexed Write
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 write enable
1
ns
T12
Write enable width (1)
5
ns
T13
Data setup to end of write enable
5
ns
T14
Data hold time from end of write enable
0
ns
T15A
Recovery Time to next write
28
ns
T15B
Recovery Time to next read (2)
52
ns
(1) Write enable is the occurrence of both CS# and IOW#.
(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 70 nsec between a read or write to EP_DATA and a read from
EP_AVAIL or EP_TRANSFER.
T1
T3
T1
T3
T19
T12
T13
T15A
T19
T12
T13
T2
T14
T2
T14
D0
D1
A0
A1
0ns
10ns
20ns
30ns
40ns
50ns
60ns
ALE
CS# & IOW#
LD[15:0]
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