adsp-2196m Analog Devices, Inc., adsp-2196m Datasheet - Page 38

• Manufacturer Part Number: adsp-2196m
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

ADSP-2196
Host Port ALE Mode Read Cycle Timing
Table 16
on ACK, Ready, ALE, and ACC mode selection, see the Host port modes description
Table 16. Host Port ALE Mode Read Cycle Timing
1
38
t
the same time.
Parameter
Switching Characteristics
t
t
t
t
Timing Requirements
t
t
t
t
t
t
t
t
t
t
NH
RHKS
RHKH
RHS
RHH
CSAL
ALCS
RCSW
ALR
RCS
ALPW
HKRD
AALS
ALAH
RDH
are peripheral bus latencies (n t
and
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
Figure 19
Description
HRD asserted to HACK asserted (setup, ACK Mode)
HRD de-asserted to HACK de-asserted (hold, ACK Mode)
HRD asserted to HACK asserted (setup, Ready Mode)
HRD asserted to HACK de-asserted (hold, Ready Mode)
HCMS or HCIOMS asserted to HALE asserted (delay)
HALE de-asserted to optional HCMS or HCIOMS
de-asserted
HRD de-asserted to HCMS or HCIOMS de-asserted
HALE de-asserted to HRD asserted
HRD de-asserted (after last byte) to HCMS or
HCIOMS de-asserted (ready for next read)
HALE asserted pulsewidth
HACK asserted to HRD de-asserted (hold, ACK Mode)
Address valid to HALE de-asserted (setup)
HALE de-asserted to address invalid (hold)
HRD de-asserted to data invalid (hold)
describe host port read operations in Address Latch Enable (ALE) mode. For more information
HCLK
For current information contact Analog Devices at 800/262-5643
); these are internal DSP latencies related to the number of peripherals attempting to access DSP memory at
Min
2
0
1
1
1
1
4
1.5
4
1
1
on page
10.
September 2001
Max
2+t
2
2
2+t
NH
NH
1
1
REV. PrA
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns