adsp-21161n Analog Devices, Inc., adsp-21161n Datasheet - Page 31

• Manufacturer Part Number: adsp-21161n
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

Host Bus Request
Use these specifications for asynchronous host bus requests of an
ADSP-21161N (HBR, HBG).
Table 19. Host Bus Request
1
2
REV. A
Parameter
Timing Requirements
t
t
t
t
t
Switching Characteristics
t
t
t
t
t
Only required for recognition in the current cycle.
(O/D) = open drain, (A/D) = active drive.
HBGRCSV
SHBRI
HHBRI
SHBGI
HHBGI
DHBGO
HHBGO
DRDYCS
TRDYHG
ARDYTR
CLKIN
HBR
HBG
HBG
HBR
REDY
REDY
HBG
RD
WR
CS
(O/D)
(A/D)
CS
(OUT)
(IN)
(OUT)
O/D = OPEN DRAIN, A/D = ACTIVE DRIVE
HBG Low to RD/WR/CS Valid
HBR Setup Before CLKIN
HBR Hold After CLKIN
HBG Setup Before CLKIN
HBG Hold After CLKIN
HBG Delay After CLKIN
HBG Hold After CLKIN
REDY (O/D) or (A/D) Low from CS and HBR Low
REDY (O/D) Disable or REDY (A/D) High from HBG
REDY (A/D) Disable from CS or HBR High
t
D R DY C S
t
SH B R I
1
1
t
H H B GO
Figure 24. Host Bus Request
t
D H BG O
t
H H BR I
t
–31–
H B GR CS V
2
t
TR D YH G
2
2
t
Min
6
1
6
1
1.5
t
SH B GI
CKOP
+14
t
H H B GI
Max
19
7
10
11
ADSP-21161N
t
A R D YTR
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns