cx28250 Mindspeed Technologies, cx28250 Datasheet - Page 178
cx28250
Manufacturer Part Number
cx28250
Description
Cx28250 Atm Physical Interface Phy Devices
Manufacturer
Mindspeed Technologies
Datasheet
1.CX28250.pdf
(213 pages)
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5.0 Electrical and Mechanical Specifications
5.1 Timing Specifications
Figure 5-6. Asynchronous Mode, Write Timing
Table 5-5. Asynchronous Mode, Write Timing Table (High-Performance Access Time)
5-12
t
t
t
t
t
t
t
t
NOTE(S):
(1)
(2)
pwl
pwh
s1
h1
s2
h2
enzl
dislz
Label
Due to internal sampling mechanisms used, these times are specified in clock cycles rather than absolute values. For these
calculations Clk equals the period of clock selected via the Clk pin (either 26 ns or 52 ns; see
Timing starts with either MCs* or MRd*, whichever occurs last.
MCs* + MWr*
MSyncMode
MAddr[6:0]
MData[7:0]
Pulse Width Low, (MCs* + MWr*)
Pulse Width High, (MCs* + MWr*)
Setup, MAddr[6:0] to the falling edge of (MCs* + MWr*)
Hold, MAddr[6:0] from the rising edge of (MCs* + MWr*)
Setup, MData[7:0] from the falling edge of (MCs* + MWr*)
Hold, MData[7:0] from the rising edge of (MCs* + MWr*)
Enable, MRdy from the falling edge of (MCs* + MRd*)
Disable, MRdy from the rising edge of (MCs* + MRd*)
MRdy
MRd*
(high)
(low)
t
s1
Description
Mindspeed Technologies
(2)
t
enzl
t
s2
t
pwl
t
dislz
™
ATM Physical Interface (PHY) Devices
t
2 x Clk + 15 ns
h1
t
h2
Clk + 15 ns
t
Min
pwh
—
41
2
7
7
1
Section
(1)
(1)
2.6).
28250-DSH-002-C
1 Clk
Max
—
—
—
—
—
10
70
(1)
CX28250
ns
ns
500035
Unit
ns
ns
ns
ns
ns
ns
_031
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