ADSP-21266SKBCZ-2B Analog Devices Inc, ADSP-21266SKBCZ-2B Datasheet - Page 27

• Manufacturer Part Number: ADSP-21266SKBCZ-2B
• Manufacturer: Analog Devices Inc

Specifications of ADSP-21266SKBCZ-2B

• Device Core Size: 32b
• Architecture: Super Harvard
• Format: Floating Point
• Clock Freq (max): 200MHz
• Mips: 200
• Device Input Clock Speed: 200MHz
• Ram Size: 256KB
• Program Memory Size: 512KB
• Operating Supply Voltage (typ): 1.2/3.3V
• Operating Supply Voltage (min): 1.14/3.13V
• Operating Supply Voltage (max): 1.26/3.47V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 136
• Lead Free Status / Rohs Status: Compliant

Table 28. 16-Bit Memory Write Cycle
1
Parameter
Switching Characteristics
t
t
t
t
t
t
t
t
D = (The value set by the PPDUR Bits (5–1) in the PPCTL register) × t
H = t
On reset, ALE is an active high cycle. However, it can be reconfigured by software to be active low.
ALEW
ALERW
ADAS
ADAH
WW
ALEHZ
DWS
DWH
1
1
1
CCLK
(if a hold cycle is specified, else H = 0)
ALE Pulse Width
ALE Deasserted to Read/Write Asserted
Address/Data 15–0 Setup Before ALE Deasserted
Address/Data 15–0 Hold After ALE Deasserted
WR Pulse Width
ALE Deasserted to Address/Data 15–0 in High-Z
Address/Data 15–0 Setup Before WR High
Address/Data 15–0 Hold After WR High
AD15 - 0
ALE
WR
RD
VALID ADDRESS
t
ADAS
t
ALEW
Figure 19. 16-Bit Memory Write Cycle
Rev. F | Page 27 of 44 | July 2009
t
ADAH
t
ALEH
t
ALERW
CCLK
ADSP-21261/ADSP-21262/ADSP-21266
t
t
DWS
WW
VALID DATA
Min
2 × t
1 × t
2.5 × t
0.5 × t
D – 2
0.5 × t
D
0.5 × t
CCLK
CCLK
CCLK
CCLK
CCLK
CCLK
– 2
– 0.5
t
– 2.0
– 0.8
– 0.8
– 1.5 + H
DWH
Max
0.5 × t
CCLK
+ 2.0 ns
Unit
ns
ns
ns
ns
ns
ns
ns