LSI Logic Confidential
18-12
Specifications
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Figure 18.11 Multiplexed Address Async Master Read Cycle
Note:
In
, TCS, TDS, TAH, TDT, TBDT, and TBH are
programmable parameter delays. They represent delay in
the number of clock cycles. They can be programmed in
the personality dependent register of each chip select.
T
BH
T
CS
T
data_valid_begin1
M_A (O)
M_ALE (O)
M_CS (O)
M_UWE/LWE (O)
M_OE (O)
M_D (I/O)
Low Addr
Low Addr
Middle Addr
Data
Data
T
PW
T
AH
High Addr
T
DS
T
BH
T
holdCS
T
data_valid_end1
Table 18.5
Async Host Master Timing Parameters - Master Mode Only (Master
replaces Slave)
Parameters
Description
Min
Max
T
PW
M_ALE pulse width from M_A and M_ALE
asserted to fall of M_ALE. This can be treated as
setup time.
AS clock cycles
−
2 ns
AS clock cycles
+ 2 ns
T
AH
Time from fall of M_ALE to M_A/M_D change.
This can be treated as hold time by an external
device.
AH clock cycles
−
4 ns
AH clock cycles
+ 2 ns
T
CS
Delay from M_A and R/W to fall of M_CS.
CS clock cycles
−
5 ns
CS clock cycles
+ 3 ns
Содержание DMN-8600
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