adsp-21msp58 Analog Devices, Inc., adsp-21msp58 Datasheet - Page 27

• Manufacturer Part Number: adsp-21msp58
• Description: Dsp Microcomputers
• Manufacturer: Analog Devices, Inc.

REV. 0
Parameter
Bus Request/Grant
Timing Requirement:
t
t
Switching Characteristic:
t
t
t
t
NOTES
1
BR is an asynchronous signal. If BR meets the setup/hold requirements, it will be recognized during the current clock cycle; otherwise the signal will be recognized
BH
BS
SD
SDB
SE
SEC
on the following cycle. Refer to the ADSP-2100 Family User’s Manual for BR/BG cycle relationships.
BR Hold after CLKOUT High
BR Setup before CLKOUT Low
CLKOUT High to DMS, PMS, BMS,
RD, WR Disable
DMS, PMS, BMS, RD, WR
Disable to BG Low
BG High to DMS, PMS, BMS,
RD, WR Enable
DMS, PMS, BMS, RD, WR
Enable to CLKOUT High
PMS, DMS,
BMS,RD,
CLKOUT
CLKOUT
WR
BR
BG
t
SD
Figure 17. Bus Request–Bus Grant
t
BH
1
t
1
t
BS
SDB
–27–
Min
0.25t
0.25t
0
0
0.25t
CK
CK
CK
t
SE
+ 2
+ 17
– 7
t
S E C
ADSP-21msp58/59
Max
0.25t
CK
+ 10
Unit
ns
ns
ns
ns
ns
ns