XRT79L72 Datasheet, PDF (51/72 Pages) Exar Corporation – 2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

xr
PRELIMINARY
2 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L72
REV. P1.0.2
MICROPROCESSOR INTERFACE TIMING - ASYNCHRONOUS MOTOROLA (68K)
MODE
FIGURE 4. ASYNCHRONUS MODE 2 - MOTOROLA 68K PROGRAMMED I/O TIMING (WRITE CYCLE)
CS
ALE_AS
A[14:0]
D[7:0]
RD_DS
WR_R/W
RDY_DTACK
t₀
t₁
Address
t₂
Data
t₃
t₄
NOTE: The values for "t0" through "t7" can be found in Table 3.
FIGURE 5. ASYNCHRONUS MODE 2 - MOTOROLA 68 PROGRAMMED I/O TIMING (READ CYCLE)
CS
ALE_AS
A[14:0]
D[7:0]
RD_DS
WR_R/W
RDY DTACK
t₀
t₁
Address
t₅
t₇
Data
t₆
NOTE: The values for "t0" through "t7" can be found in Table 3.
48