XRT73LC04A_08 Datasheet, PDF (27/64 Pages) Exar Corporation – 4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

REV. 1.0.2
XRT73LC04A
4 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
ELECTRICAL CHARACTERISTICS (CONTINUED), (TA = 25°C, VDD = 3.3V + 5%, UNLESS OTHERWISE SPECIFIED)
MICROPROCESSOR SERIAL INTERFACE TIMING (SEE FIGURE 12)
SYMBOL
PARAMETER
MIN.
TYP.
MAX
UNITS
t₂₁ CS Low to Rising Edge of SClk Setup Time
5
ns
t₂₂ SCLK Falling Edge to CS Low Assertion Time
5
ns
t₂₃ SDI to Rising Edge of SClk Setup Time
5
ns
t₂₄ SDI to Rising Edge of SClk Hold Time
5
ns
t₂₅ SClk "Low" Time
65
80
ns
t₂₆ SClk "High" Time
65
80
ns
t₂₇ SClk Period
160
ns
t₂₈ CS Low to Rising Edge of SClk Hold Time
5
ns
t₂₉ CS "Inactive" Time
160
ns
t₃₀ Falling Edge of SClk to SDO Valid Time
80
ns
t₃₁ Falling Edge of SClk to SDO Invalid Time
65
ns
t₃₂ Rising edge of CS to High Z
100
ns
t₃₃ Rise/Fall time of SDO Output
20
ns
NOTE: The load is 10pF
FIGURE 12. TIMING DIAGRAM FOR THE MICROPROCESSOR SERIAL INTERFACE
CS
SCLK
SDI
t21
t22
t23
t24
R/W
t27
t25
t26
A0
A1
t29
t28
CS
SCLK
t30
t31
SDO _Hi-Z
D0
D1
Hi-Z
SDI
t33
D2
23
t32
D7