XRT83SH38ES View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SH38ES' PDF : 78 Pages View PDF
REV. 1.0.7
XRT83SH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
FIGURE 37. MOTOROLA 68K µP INTERFACE SIGNALS DURING PROGRAMMED I/O READ AND WRITE OPERATIONS
MOTOROLA ASYCHRONOUS MODE
READ OPERATION
WRITE OPERATION
AS
ADDR[7:0]
CS
DATA[7:0]
RD_DS
WR_R/W
RDY_DTACK
t0
t3
t1
Valid Address
Valid Data for Readback
t2
t0
t3
t1
Valid Address
Data Available to Write Into the LIU
t2
TABLE 19: MOTOROLA 68K MICROPROCESSOR INTERFACE TIMING SPECIFICATIONS
SYMBOL
PARAMETER
MIN
MAX
UNITS
t0
Valid Address to CS Falling Edge
0
-
ns
t1
CS Falling Edge to DS (Pin RD_DS) Assert
65
-
ns
t2
DS Assert to DTACK Assert
-
90
ns
NA
DS Pulse Width (t2)
90
-
ns
t3
CS Falling Edge to AS (Pin ALE) Falling Edge
0
-
ns
50
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