ADSP-21060C Datasheet, PDF (25/48 Pages) Analog Devices – ADSP-21060 Industrial SHARC DSP Microcomputer Family

ADSP-21060C/ADSP-21060LC
Multiprocessor Bus Request and Host Bus Request
Use these specifications for passing of bus mastership between
multiprocessing ADSP-2106xs (BRx) or a host processor
(HBR, HBG).
Parameter
Timing Requirements:
t_HBGRCSV HBG Low to RD/WR/CS Valid¹
t_SHBRI HBR Setup before CLKIN²
t_HHBRI HBR Hold before CLKIN²
t_SHBGI HBG Setup before CLKIN
t_HHBGI HBG Hold before CLKIN High
t_SBRI BRx, CPA Setup before CLKIN³
t_HBRI BRx, CPA Hold before CLKIN High
t_SRPBAI RPBA Setup before CLKIN
t_HRPBAI RPBA Hold before CLKIN
ADSP-21060C
Min
Max
20 + 3DT/4
13 + DT/2
13 + DT/2
21 + 3DT/4
20+ 5DT/4
14 + 3DT/4
6 + DT/2
6 + DT/2
12 + 3DT/4
ADSP-21060LC
Min
Max
Unit
20 + 3DT/4
13 + DT/2
13 + DT/2
21 + 3DT/4
20+ 5DT/4 ns
ns
14 + 3DT/4 ns
ns
6 + DT/2
ns
ns
6 + DT/2
ns
ns
12 + 3DT/4 ns
Switching Characteristics:
t_DHBGO HBG Delay after CLKIN
t_HHBGO HBG Hold after CLKIN
t_DBRO BRx Delay after CLKIN
t_HBRO BRx Hold after CLKIN
t_DCPAO CPA Low Delay after CLKIN
t_TRCPA CPA Disable after CLKIN
t_DRDYCS REDY (O/D) or (A/D) Low from CS
and HBR Low⁴
t_TRDYHG REDY (O/D) Disable or REDY (A/D)
High from HBG⁴
t_ARDYTR REDY (A/D) Disable from CS or
HBR High⁴
–2 – DT/8
–2 – DT/8
–2 – DT/8
40 + 23DT/16
7 – DT/8
7 – DT/8
8 – DT/8
4.5 – DT/8
8.5
10
–2 – DT/8
–2 – DT/8
–2 – DT/8
7 – DT/8
ns
ns
7 – DT/8
ns
ns
8.5 – DT/8 ns
4.5 – DT/8 ns
11.0
ns
40 + 23DT/16
ns
10
ns
NOTES
1_{For first asynchronous access after HBR and CS asserted, ADDR31-0 must be a non-MMS value 1/2 tCK before RD or WR goes low or by tHBGRCSV after HBG goes}
low. This is easily accomplished by driving an upper address signal high when HBG is asserted. See the “Host Processor Control of the ADSP-2106x” section in the
ADSP-2106x SHARC User’s Manual, Second Edition.
2_{Only required for recognition in the current cycle.}
3_{CPA assertion must meet the setup to CLKIN; deassertion does not need to meet the setup to CLKIN.}
4_{(O/D) = open drain, (A/D) = active drive.}
REV. B
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