adsp-21msp58 Analog Devices, Inc., adsp-21msp58 Datasheet - Page 33

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

REV. 0
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
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.
HALP
HASU
HAH
HALS
HDSU
HWDH
HRWP
HSHK
HKH
HDE
HDD
HRDH
HRDD
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
HOST WRITE CYCLE
HOST READ CYCLE
Figure 23. Host Interface Port (HMD1 = 1, HMD0 = 0)
HAD7–0
HAD7–0
HACK
HACK
5
HSEL
HSEL
HWR
HRD
ALE
ALE
t
t
H A S U
H A S U
1, 2
ADDRESS
ADDRESS
3
1, 2
3, 4
2
t
t
3
H A H
H A H
4
2
t
t
t
H A L S
H A L P
H A L P
–33–
t
H A L S
t
t
HSHK
t
HDE
t
t
H S H K
H R W P
HDD
t
t
H D S U
H R W P
DATA
Min
10
5
2
10
5
3
20
0
0
0
0
DATA
t
H K H
t
t
H W D H
H K H
t
HRDH
t
HRDD
ADSP-21msp58/59
Max
15
15
18
7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns