Datasheet

ADSP-21161N
Rev. C | Page 33 of 60 | January 2013
Host Bus Request
Use these specifications for asynchronous host bus requests of
an ADSP-21161N (HBR
, HBG).
Table 20. Host Bus Request
100 MHz 110 MHz
Parameter Min Max Min Max Unit
Timing Requirements
t
HBGRCSV
HBG Low to RD/WR/CS Valid 19 19 ns
t
SHBRI
HBR Setup Before CLKIN
1
66ns
t
HHBRI
HBR Hold After CLKIN
1
11ns
t
SHBGI
HBG Setup Before CLKIN 6 6 ns
t
HHBGI
HBG Hold After CLKIN 1 1 ns
Switching Characteristics
t
DHBGO
HBG Delay After CLKIN 7 7 ns
t
HHBGO
HBG Hold After CLKIN 1.5 1.5 ns
t
DRDYCS
REDY (O/D) or (A/D) Low from CS and HBR Low
2
10 10 ns
t
TRDYHG
REDY (O/D) Disable or REDY (A/D) High from HBG
2
t
CKOP
+ 14 t
CKOP
+ 12 ns
t
ARDYTR
REDY (A/D) Disable from CS or HBR High
2
11 11 ns
1
Only required for recognition in the current cycle.
2
(O/D) = open drain, (A/D) = active drive.