adsp-21msp58 Analog Devices, Inc., adsp-21msp58 Datasheet - Page 34

• Manufacturer Part Number: adsp-21msp58
• Description: Dsp Microcomputers
• Manufacturer: Analog Devices, Inc.

ADSP-21msp58/59
Parameter
Host Interface Port
Multiplexed Data and Address (HMD1 = 1)
Read Strobe and Write Strobe (HMD0 = 1)
Timing Requirement:
t
t
t
t
t
t
t
t
t
Switching Characteristic:
t
t
t
t
t
t
NOTES
1
2
3
HALP
HASU
HAH
HALS
HSU
HDSU
HWDH
HH
HRWP
HSHK
HKH
HDE
HDD
HRDH
HRDD
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.
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
HRW Setup before Start of Write or Read
HAD15-0 Data Setup before End of Write
HAD15-0 Data Hold after End of Write
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
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
HOST WRITE CYCLE
HOST READ CYCLE
Figure 24. Host Interface Port (HMD1 = 1, HMD0 = 1)
HAD7–0
HAD7–0
HACK
HSEL
3
HACK
HSEL
HRW
HRW
HDS
ALE
HDS
ALE
t
t
H A S U
1
HASU
ADDRESS
ADDRESS
2
2
2
2
1
1
1
t
t
2
HAH
H A H
2
1
t
t
H A L P
H A L P
–34–
t
t
H A L S
H A L S
t
HDE
t
t
t
HDD
H S U
H S U
t
t
HSHK
t
t
H S H K
H R W P
H R W P
10
5
10
5
5
3
3
20
0
0
0
0
Min
2
t
HDSU
DATA
DATA
t
t
t
HWDH
t
t
H K H
HKH
t
H H
H H
HRDH
t
HRDD
Max
15
15
18
7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
REV. 0