AD9520-2 Analog Devices, Inc., AD9520-2 Datasheet - Page 53
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AD9520-2
Manufacturer Part Number
AD9520-2
Description
12 Lvpecl/24 Cmos Output Clock Generator With Integrated 2.2 Ghz Vco
Manufacturer
Analog Devices, Inc.
Datasheet
1.AD9520-2.pdf
(84 pages)
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Data Transfer Format
Send byte format—the send byte protocol is used to set up the register address for subsequent commands.
S
Write byte format—the write byte protocol is used to write a register address to the RAM starting from the specified RAM address.
S
Receive byte format—the receive byte protocol is used to read the data byte(s) from RAM starting from the current address.
S
Read byte format—the combined format of the send byte and the receive byte.
S
I²C Serial Port Timing
Table 42. I2C Timing Definitions
Parameter
f
t
t
t
t
t
t
t
t
t
t
t
I2C
IDLE
HLD; STR
SET; STR
SET; STP
HLD; DAT
SET; DAT
LOW
HIGH
RISE
FALL
SPIKE
Slave Address
Slave
Address
SDA
SCL
Slave Address
Slave Address
t
FALL
S
W
A
t
W
HLD; STR
t
LOW
RAM Address
High Byte
A
Description
I²C clock frequency
Bus idle time between stop and start conditions
Hold time for repeated start condition
Setup time for repeated start condition
Setup time for stop condition
Hold time for data
Setup time for data
Duration of SCL clock low
Duration of SCL clock high
SCL/SDA rise time
SCL/SDA fall time
Voltage spike pulse width that must be suppressed by the input filter
W
RAM Address
High Byte
R
t
t
RISE
SET; DAT
t
HLD; DAT
A
A
A
RAM Address High Byte
RAM Data 0
RAM Address
Low Byte
t
HIGH
A
RAM Address
Low Byte
t
FALL
Figure 60. I²C Serial Port Timing
Rev. 0 | Page 53 of 84
t
SET; STR
A
A
Sr
A
Slave
Address
Sr
RAM Data 1
RAM Data 0
t
HLD; STR
A
R
A
RAM Address Low Byte
A
RAM
Data 0
RAM Data 1
t
SPIKE
A
t
SET; STP
A
RAM Data 2
t
RISE
RAM
Data 1
P
A
t
IDLE
RAM Data 2
A
RAM
Data 2
AD9520-2
S
A
A
A
A
P
P
P
P
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