adsp-2191m Analog Devices, Inc., adsp-2191m Datasheet - Page 24

• Manufacturer Part Number: adsp-2191m
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

ADSP-2191M
External Port Bus Request and Grant Cycle Timing
Table 14
bus grant operations.
Table 14. External Port Bus Request and Grant Cycle Timing
1
2
t
These are timing parameters that are based on worst-case operating conditions.
Parameter
Switching Characteristics
t
t
t
t
t
t
Timing Requirements
t
t
HCLK
SD
SE
DBG
EBG
DBH
EBH
BS
BH
is the peripheral clock period.
and
CLKOUT
MS3--0
A21–0
IOMS
BMS
BGH
1, 2
Figure 13
WR
BR
RD
BG
CLKOUT High to xMS, Address, and RD/WR Disable
CLKOUT Low to xMS, Address, and RD/WR Enable
CLKOUT High to BG Asserted Setup
CLKOUT High to BG Deasserted Hold Time
CLKOUT High to BGH Asserted Setup
CLKOUT High to BGH Deasserted Hold Time
BR Asserted to CLKOUT High Setup
CLKOUT High to BR Deasserted Hold Time
describe external port bus request and
t
BS
Figure 13. External Port Bus Request and Grant Cycle Timing
t
BH
–24–
t
t
t
t
t
SD
SD
SD
DBG
DBH
Min
0
0
0
0
0
4.6
0
Max
0.5t
4
4
4
4
4
t
t
EBG
HCLK
EBH
+1
t
t
t
SE
SE
SE
REV. A
Unit
ns
ns
ns
ns
ns
ns
ns
ns