ADSP-2185NBST-320 Analog Devices Inc, ADSP-2185NBST-320 Datasheet - Page 36

• Manufacturer Part Number: ADSP-2185NBST-320
• Description: IC DSP CONTROLLER 16BIT 100LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2185NBST-320

• Rohs Status: RoHS non-compliant
• Interface: Host Interface, Serial Port
• Clock Rate: 80MHz
• Non-volatile Memory: External
• On-chip Ram: 80kB
• Voltage - I/o: 1.8V, 2.5V, 3.3V
• Voltage - Core: 1.90V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Device Core Size: 16b
• Architecture: Enhanced Harvard
• Format: Fixed Point
• Clock Freq (max): 80MHz
• Mips: 80
• Device Input Clock Speed: 80MHz
• Ram Size: 80KB
• Program Memory Size: Not RequiredKB
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (max): 2/3.6V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: LQFP
• Lead Free Status / Rohs Status: Not Compliant

ADSP-218xN
IDMA Write, Long Write Cycle
Table 23. IDMA Write, Long Write Cycle
1
2
3
4
Parameter
Timing Requirements:
t
t
t
Switching Characteristics:
t
t
Start of Write = IS Low and IWR Low.
If Write Pulse ends before IACK Low, use specifications t
If Write Pulse ends after IACK Low, use specifications t
This is the earliest time for IACK Low from Start of Write. For IDMA Write cycle relationships, please refer to the ADSP-2100 Family User’s Manual.
IKW
IKSU
IKH
IKLW
IKHW
IACK Low Before Start of Write
IAD15–0 Data Setup Before End of Write
IAD15–0 Data Hold After End of Write
Start of Write to IACK Low
Start of Write to IACK High
IAD15–0
IACK
IWR
IS
4
IKSU
1
IDSU
, t
t
IK W
, t
IKH
Figure 34. IDMA Write, Long Write Cycle
IDH
Rev. A | Page 36 of 48 | August 2006
.
.
2, 3, 4
2, 3, 4
t
IKH W
t
IKSU
t
IK LW
DATA
t
IK H
Min
0
0.5t
0
1.5t
CK
CK
+ 5
Max
10
Unit
ns
ns
ns
ns
ns