ADV7202 datasheet(16/29 Pages) AD

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REV. 0

ADV7202

–15–

XTAL0

DATA

DOUT [9:0]

DATA

Figure 14. Standard Mode Digital Data O/P Format

The following section describes the functionality of each register.

All registers can be read from as well as written to.

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 operation

is selected, the subaddress is set up. The Subaddress Register

determines to/from which register the operation takes place.

Figure 15 shows the various operations under the control of the

Subaddress Register. “0” should always be written to SR7.

These bits are set up to point to the required starting address.

SR4

SR3

SR2

SR1

SR0

SR6

SR5

ADDRESS

SR6 SR5

SR4

SR3

SR2

SR1

SR0

00h

0000

MODE REGISTER 0

01h

0001

MODE REGISTER 1

02h

0010

MODE REGISTER 2

03h

0011

MODE REGISTER 3

04h

0100

AGC REGISTER 0

05h

0101

AGC REGISTER 1

06h

0110

CLAMP REGISTER 0

07h

0111

CLAMP REGISTER 1

08h

1000

CLAMP REGISTER 2

09h

1001

CLAMP REGISTER 3

0Ah

1010

TIMING REGISTER

0Bh

1011

VREF ADJUST REGISTER

0Ch

1100

RESERVED

0Dh

1101

RESERVED

0Eh0

1110

RESERVED

0Fh0

1111

RESERVED

10h

0000

AUX REGISTER 0

11h

0001

AUX REGISTER 1

12h

0011

AUX REGISTER 2

13h

0000

AUX REGISTER 3

14h

0100

AUX REGISTER 4

15h

0101

AUX REGISTER 5

16h

0110

AUX REGISTER 6

17h

0111

AUX REGISTER 7

ADV7202 REGISTER

SR7

Figure 15. Subaddress Registers

The MPU can write to or read from all of the registers of the

ADV7202 except the Subaddress Registers, which are write-only.

The Subaddress Register determines which register the 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 then increments to the next address until a Stop

command on the bus is performed.

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