ADV7314KST Analog Devices Inc, ADV7314KST Datasheet - Page 18

• Manufacturer Part Number: ADV7314KST
• Manufacturer: Analog Devices Inc

Specifications of ADV7314KST

• Number Of Dac's: 6
• Adc/dac Resolution: 14b
• Screening Level: Commercial
• Package Type: LQFP
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

ADV7314
Before writing to the subcarrier frequency registers, the ADV7314
must have been reset at least once since power-up.
The four subcarrier frequency registers must be updated start-
ing with subcarrier frequency register 0 through subcarrier
frequency register 3. The subcarrier frequency will not update
until the last subcarrier frequency register byte has been received
by the ADV7314.
Figure 18 illustrates an example of the data transfer for a write
sequence and the start and stop conditions.
Figure 19 shows bus write and read sequences.
REGISTER ACCESS
The MPU can write to or read from all of the registers of the
ADV7314 except the subaddress registers, which are write-only
registers. The subaddress register determines which register the
SEQUENCE
SEQUENCE
WRITE
READ
S SLAVE ADDR A(S)
S SLAVE ADDR A(S)
S = START BIT
P = STOP BIT
SCLOCK
SDATA
LSB = 0
A(S) = ACKNOWLEDGE BY SLAVE
A(M) = ACKNOWLEDGE BY MASTER
START ADRR R/W ACK SUBADDRESS ACK
S
SUB ADDR
SUB ADDR
Figure 19. Write and Read Sequence
1–7
Figure 18. Bus Data Transfer
8
A(S)
A(S) S SLAVE ADDR
9
DATA
1–7
–18–
LSB = 1
next read or write operation accesses. All communications with
the part through the bus start with an access to the subaddress
register. A read/write operation is then performed from/to the
target address, which increments to the next address until a stop
command on the bus is performed.
Register Programming
The following section describes the functionality of each register.
All registers can be read from as well as written to unless other-
wise stated.
Subaddress Register (SR7–SR0)
The communications register is an 8-bit write-only register. After
the part has been accessed over the bus and a read/write opera-
tion is selected, the subaddress is set up. The subaddress register
determines to/from which register the operation takes place.
8
A(S)
A(S) = NO-ACKNOWLEDGE BY SLAVE
A(M) = NO-ACKNOWLEDGE BY MASTER
A(S)
9
DATA
1–7
DATA
8
DATA
ACK
A(M)
9
STOP
P
A(S) P
DATA
A(M)
P
REV. 0