ADSP-2186LBCA-160 Analog Devices Inc, ADSP-2186LBCA-160 Datasheet - Page 35

• Manufacturer Part Number: ADSP-2186LBCA-160
• Description: IC DSP 16BIT 80MHZ 144CSPBGA
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2186LBCA-160

• Rohs Status: RoHS non-compliant
• Interface: Host Interface, Serial Port
• Clock Rate: 40MHz
• Non-volatile Memory: External
• On-chip Ram: 40kB
• Voltage - I/o: 3.30V
• Voltage - Core: 3.30V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 144-CSPBGA

IDMA Read, Short Read Cycle in Short Read Only Mode
Table 25. IDMA Read, Short Read Cycle in Short Read Only Mode
1
2
3
4
Parameter
Timing Requirements:
t
t
Switching Characteristics:
t
t
t
t
t
Applies to the ADSP-2187L only.
Short Read Only is enabled by setting Bit 14 of the IDMA overlay Register to 1 (0x3FE7). Short Read Only can be enabled by the processor core writing to the register or by
Start of Read = IS Low and IRD Low. Previous data remains until end of read.
End of Read = IS High or IRD High.
IKR
IRP
IKHR
IKDH
IKDD
IRDE
IRDV
an external host writing to the register. Disabled by default.
2
IACK Low Before Start of Read
Duration of Read
IACK High After Start of Read
IAD15–0 Previous Data Hold After End of Read
IAD15–0 Previous Data Disabled After End of Read
IAD15–0 Previous Data Enabled After Start of Read
IAD15–0 Previous Data Valid After Start of Read
4
IA D 15–0
Figure 27. IDMA Read, Short Read Cycle in Short Read Only Mode
L EG EN D :
IA CK
IRD
IM PL IES TH A T IS A N D IR D C A N B E
HE LD IN D E FIN ITE LY B Y H O S T
IS
3
3
t
ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Rev. C | Page 35 of 48 | January 2008
IK R
t
IR D E
t
IK H R
t
IR D V
4
4
t
IR P
1
PR E V IO U S
D A TA
t
IK D D
Min
0
10
0
0
t
IK D H
Max
10
10
10
Unit
ns
ns
ns
ns
ns
ns
ns