ADSP-2171 Analog Devices, ADSP-2171 Datasheet - Page 41

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

REV. A
ADSP-2173
Parameter
Host Interface Port
Multiplexed Data and Address (HMD1 = 1)
Read Strobe and Write Strobe (HMD0 = 0)
Timing Requirement:
t
t
t
t
t
t
t
Switching Characteristic:
t
t
t
t
t
t
NOTES
1
2
3
4
5
HALP
HASU
HAH
HALS
HDSU
HWDH
HRWP
HSHK
HKH
HDE
HDD
HRDH
HRDD
Start of Write = HWR Low and HSEL Low.
Start of Read = HRD Low and HSEL Low.
End of Write = HWR High or HSEL High.
End of Read = HRD High or HSEL High.
Read Pulse Width = HRD Low and HSEL Low, Write Pulse Width = HWR Low and HSEL Low.
Host Write Cycle
Host Read Cycle
ALE Pulse Width
HAD15–0 Address Setup, before ALE Low
HAD15–0 Address Hold after ALE Low
Start of Write or Read after ALE Low
HAD15–0 Data Setup before End of Write
HAD15–0 Data Hold after End of Write
Read or Write Pulse Width
HACK Low after Start of Write or Read
HACK Hold after End of Write or Read
HAD15–0 Data Enabled after Start of Read
HAD15–0 Data Valid after Start of Read
HAD15–0 Data Hold after End of Read
HAD15–0 Data Disabled after End of Read
HAD15–0
HD15–0
HACK
HSEL
HACK
HSEL
HRD
HWR
ALE
ALE
Figure 32. Host Interface Port (HMD1 = 1, HMD0 = 0)
t
t
t
HASU
t
HALP
HASU
HALP
ADDRESS
ADDRESS
5
t
t
HAH
HAH
t
HALS
t
HALS
1, 2
1, 2
3, 4
3
2
3
2
4
–41–
t
t
HSHK
HDE
t
t
HDD
t
HSHK
HRWP
t
ADSP-2171/ADSP-2172/ADSP-2173
HDSU
t
DATA
HRWP
Min
15
5
2
15
8
3
30
0
0
0
0
DATA
t
t
HRDH
HRDD
t
HKH
t
t
HKH
HWDH
Max
20
20
23
15
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns