ADSP-2171 Analog Devices, ADSP-2171 Datasheet - Page 40

• Manufacturer Part Number: ADSP-2171
• Description: ADSP-2100 Family DSP Microcomputers
• Manufacturer: Analog Devices

ADSP-2171/ADSP-2172/ADSP-2173
ADSP-2173
Parameter
Host Interface Port
Separate Data and Address (HMD1 = 0)
Read Strobe and Write Strobe (HMD0 = 1)
Timing Requirement:
t
t
t
t
t
Switching Characteristic:
t
t
t
t
t
t
NOTES
1
2
3
Start of Write or Read = HDS Low and HSEL Low.
End of Write or Read = HDS High and HSEL High.
Read or Write Pulse Width = HDS Low and HSEL Low.
HSU
HDSU
HWDH
HH
HRWP
HSHK
HKH
HDE
HDD
HRDH
HRDD
Host Write Cycle
Host Read Cycle
HA2–0, HRW Setup before Start of Write or Read
Data Setup before End of Write
Data Hold after End of Write
HA2–0, HRW Hold after End of Write or Read
Read or Write Pulse Width
HACK Low after Start of Write or Read
HACK Hold after End of Write or Read
Data Enabled after Start of Read
Data Valid after Start of Read
Data Hold after End of Read
Data Disabled after End of Read
HD15–0
HD15–0
HA2–0
HA2–0
HACK
HSEL
HACK
HRW
HDS
HSEL
HRW
HDS
Figure 31. Host Interface Port (HMD1 = 0, HMD0 = 1)
t
t
t
t
HSU
3
HDE
HDD
HSU
2
2
1
2
1
2
t
t
ADDRESS
HSHK
HSHK
ADDRESS
1
2
t
t
HRWP
HRWP
t
HDSU
–40–
2
DATA
DATA
1
t
t
HRDH
HRDD
t
t
HKH
t
HKH
t
HH
HH
Min
8
8
3
3
30
0
0
0
0
t
HWDH
Max
20
20
23
15
REV. A
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns