ADSP-21xx
–40–
REV.
TIMING PARAMETERS (ADSP-2111)
HOST INTERFACE PORT
Multiplexed Data & Address (HMD1 = 1)
Read Strobe & Write Strobe (HMD0 = 0)
13.0 MHz 16.67 MHz 20 MHz No Frequency
Parameter Min Max Min Max Min Max Dependency Unit
Timing Requirement:
t
HALP
ALE Pulse Width 15 15 15 ns
t
HASU
HAD15-0 Address Setup before ALE Low 5 5 5 ns
t
HAH
HAD15-0 Address Hold after ALE Low 2 2 2 ns
t
HALS
Start of Write or Read after ALE Low
1, 2
15 15 15 ns
t
HDSU
HAD15-0 Data Setup before End of Write
3
888 ns
t
HWDH
HAD15-0 Data Hold after End of Write
3
333 ns
t
HRWP
Read or Write Pulse Width
5
30 30 30 ns
Switching Characteristic:
t
HSHK
HACK Low after Start of Write or Read
1, 2
020 020 020 ns
t
HKH
HACK Hold after End of Write or Read
3, 4
020 020 020 ns
t
HDE
HAD15-0 Data Enabled after Start of Read
2
000 ns
t
HDD
HAD15-0 Data Valid after Start of Read
2
23 23 23 ns
t
HRDH
HAD15-0 Data Hold after End of Read
4
000 ns
t
HRDD
HAD15-0 Data Disabled after End of Read
4
10 10 10 ns
NOTES
1
Start of Write = HWR Low and HSEL Low.
2
Start of Read = HRD Low and HSEL Low.
3
End of Write = HWR High or HSEL High.
4
End of Read = HRD High or HSEL High.
5
Read Pulse Width = HRD Low and HSEL Low, Write Pulse Width = HWR Low and HSEL Low.
