![](http://datasheet.mmic.net.cn/310000/ADSP-2171BS-104_datasheet_16243338/ADSP-2171BS-104_40.png)
REV. A
–40–
ADSP-2171/ADSP-2172/ADSP-2173
ADSP-2173
Parameter
Min
Max
Unit
Host Interface Port
Separate Data and Address (HMD1 = 0)
Read Strobe and Write Strobe (HMD0 = 1)
T iming Requirement:
t
HSU
t
HDSU
t
HWDH
t
HH
t
HRWP
HA2–0, HRW Setup before Start of Write or Read
1
Data Setup before End of Write
2
Data Hold after End of Write
2
HA2–0, HRW Hold after End of Write or Read
2
Read or Write Pulse Width
3
8
8
3
3
30
ns
ns
ns
ns
ns
Switching Characteristic:
t
HSHK
t
HK H
t
HDE
t
HDD
t
HRDH
t
HRDD
HACK
Low after Start of Write or Read
1
HACK
Hold after End of Write or Read
2
Data Enabled after Start of Read
1
Data Valid after Start of Read
1
Data Hold after End of Read
2
Data Disabled after End of Read
2
0
0
0
20
20
ns
ns
ns
ns
ns
ns
23
0
15
NOT ES
1
Start of Write or Read =
HDS
Low and
HSEL
Low.
2
End of Write or Read =
HDS
High and
HSEL
High.
3
Read or Write Pulse Width =
HDS
Low and
HSEL
Low.
DATA
HD15–0
HSEL
HRW
HACK
HA2–0
ADDRESS
t
HSU
t
HH
t
HWDH
t
HRWP
t
HSHK
t
HKH
t
HDSU
HDS
DATA
HD15–0
HSEL
HDS
HACK
HA2–0
ADDRESS
t
HSU
t
HH
t
HRWP
t
HRDH
t
HRDD
t
HKH
t
HSHK
t
HDE
t
HDD
HRW
Figure 31. Host Interface Port (HMD1 = 0, HMD0 = 1)
Host Write Cycle
Host Read Cycle