XRT83L314 Datasheet, PDF (53/84 Pages) Exar Corporation – 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT

XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
FIGURE 44. MOTOROLA 68K µP INTERFACE SIGNALS DURING PROGRAMMED I/O READ AND WRITE OPERATIONS
MOTOROLA ASYCHRONOUS MODE
READ OPERATION
WRITE OPERATION
ALE_TS
ADDR[10:0]
CS
DATA[7:0]
RD_WE
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 20: MOTOROLA 68K MICROPROCESSOR INTERFACE TIMING SPECIFICATIONS
SYMBOL
PARAMETER
MIN
MAX
UNITS
t₀
Valid Address to CS Falling Edge
0
t₁
CS Falling Edge to DS (Pin RD_WE) Assert
30
t₂
DS Assert to DTACK Assert
-
NA
DS Pulse Width (t₂)
150
t₃
CS Falling Edge to AS (Pin ALE_TS) Falling Edge
0
-
ns
-
ns
150
ns
-
ns
-
ns
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