XRT73LC00A_08 Datasheet, PDF (24/63 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT

REV. 1.0.1
AC ELECTRICAL CHARACTERISTICS (CONT.)
(Ta = 25^°C, Vdd = 3.3V + 5%, unless otherwise specified)
SYMBOL
PARAMETER
Microprocessor Serial Interface Timing (see Figure 8)
t₂₁ CS Low to Rising Edge of SCLK Setup Time
t₂₂ SCLK Falling Edge to CS Low Assertion Time
t₂₃ SDI to Rising Edge of SCLK Setup Time
t₂₄ SDI to Rising Edge of SCLK Hold Time
t₂₅ SCLK “Low” Time
t₂₆ SCLK “High” Time
t₂₇ SCLK Period
t₂₈ CS Low to Rising Edge of SCLK Hold Time
t₂₉ CS Inactive Time
t₃₀ Falling Edge of SCLK to SDO Valid Time
t₃₁ Falling Edge of SCLK to SDO Invalid Time
t₃₂ Falling Edge of SCLK or Rising Edge of CS to High Z
t₃₃ Rise/Fall time of SDO Output
XRT73LC00A
E3/DS3/STS-1 LINE INTERFACE UNIT
MIN.
TYP.
MAX.
UNITS
5
ns
20
ns
50
ns
50
ns
240
ns
240
ns
500
ns
5
ns
250
ns
200
ns
100
ns
100
ns
40
ns
FIGURE 8. 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
t32
D7
19