ADSP-2105_15 Datasheet, PDF (40/64 Pages) Analog Devices – ADSP-2100 Family DSP Microcomputers

ADSP-21xx
TIMING PARAMETERS (ADSP-2111)
HOST INTERFACE PORT
Multiplexed Data & Address (HMD1 = 1)
Read Strobe & Write Strobe (HMD0 = 0)
Parameter
13.0 MHz 16.67 MHz
Min Max Min Max
Timing Requirement:
t_HALP ALE Pulse Width
t_HASU HAD15-0 Address Setup before ALE Low
t_HAH HAD15-0 Address Hold after ALE Low
t_HALS Start of Write or Read after ALE Low^{1, 2}
t_HDSU HAD15-0 Data Setup before End of Write³
t_HWDH HAD15-0 Data Hold after End of Write³
t_HRWP Read or Write Pulse Width⁵
Switching Characteristic:
t_HSHK HACK Low after Start of Write or Read^{1, 2}
t_HKH HACK Hold after End of Write or Read^{3, 4}
t_HDE HAD15-0 Data Enabled after Start of Read²
t_HDD HAD15-0 Data Valid after Start of Read²
t_HRDH HAD15-0 Data Hold after End of Read⁴
t_HRDD HAD15-0 Data Disabled after End of Read⁴
15
5
2
15
8
3
30
0 20
0 20
0
23
0
10
15
5
2
15
8
3
30
0 20
0 20
0
23
0
10
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.}
20 MHz
No Frequency
Min Max Dependency Unit
15
ns
5
ns
2
ns
15
ns
8
ns
3
ns
30
ns
0 20
ns
0 20
ns
0
ns
23
ns
0
ns
10
ns
–40–
REV. B