XRT7302IV View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IV' PDF : 62 Pages View PDF
XRT7302 2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
áç
REV. 1.1.6
ELECTRICAL CHARACTERISTICS (CONTINUED), (TA = 250C, VDD = 5 + 5%, UNLESS OTHERWISE SPECIFIED)
MICROPROCESSOR SERIAL INTERFACE TIMING (SEE ƒIGURE 5)
SYMBOL
PARAMETER
MIN.
TYP.
MAX
UNITS
t21 CS Low to Rising Edge of SClk Setup Time
50
ns
t22 CS High to Rising Edge of SClk Hold Time
20
ns
t23 SDI to Rising Edge of SClk Setup Time
50
ns
t24 SDI to Rising Edge of SClk Hold Time
50
ns
t25 SClk "Low" Time
240
ns
t26 SClk "High" Time
240
ns
t27 SClk Period
500
ns
t28 CS Low to Rising Edge of SClk Hold Time
50
ns
t29 CS "Inactive" Time
250
ns
t30 Falling Edge of SClk to SDO Valid Time
200
ns
t31 Falling Edge of SClk to SDO Invalid Time
100
ns
t32 Falling Edge of SClk, or rising edge of CS to High Z
100
ns
t33 Rise/Fall time of SDO Output
40
ns
FIGURE 4. MICROPROCESSOR SERIAL INTERFACE DATA STRUCTURE
CS
SClk
SDI
SDO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
R/W A0 A1 A2 A3 0 0 A6 D0 D1 D2 D3 D4 D5 D6 D7
High Z
High Z
D0 D1 D2 D3 D4 0 0 0
NOTES:
1. A4 and A5 are always "0".
2. R/W = "1" for "Read" Operations
3. R/W = "0" for "Write" Operations
4. A shaded pulse, denotes a “don’t care” value.
20
Share Link: 
