Analog Devices Advantiv ADV7611 Hardware User's Manual page 142

UG-180
CEC RECEIVE SECTION
The receive section features the hardware required for the CEC module to act as a follower. Once the CEC module is powered up via the
CEC_POWER_UP bit the CEC Rx section will immediately begin monitoring the CEC bus for messages with the correct logical
address(es). When the message reception is completed the CEC receive section generates an interrupt (assuming the corresponding
interrupt mask bits are set accordingly).
The host can disable message reception while keeping the CEC module powered up by using the FORCE_NACK bit to not acknowledge
received messages.
CEC_FORCE_NACK , Addr 80 (CEC), Address 0x27[1]
Force NO-ACK control.
Setting this bit forces the CEC controller not acknowledge any received messages.
Function
CEC_FORCE_NACK
0 (default)
1
Logical Address Configuration
The host must set the destination logical address(es) that the CEC receive section will respond to. Up to three logical addresses can be
enabled allowing support for multifunction devices such as DVD recorders with TV tuners, which require multiple logical addresses. The
logical address(es) are set via the following registers:
•
CEC_LOGICAL_ADDRESS2[3:0] if CEC_LOGICAL_ADDRESS_MASK[2] is set to 1
•
CEC_LOGICAL_ADDRESS1[3:0] if CEC_LOGICAL_ADDRESS_MASK[1] is set to 1
•
CEC_LOGICAL_ADDRESS0[3:0] if CEC_LOGICAL_ADDRESS_MASK[0] is set to 1
CEC_LOGICAL_ADDRESS2[3:0] , Addr 80 (CEC), Address 0x29[3:0]
Logical address 2 ― this address must be enabled by setting CEC_LOGICAL_ADDRESS_MASK[2] to 1.
Function
CEC_LOGICAL_ADDRESS2[3:0]
1111 (default)
xxxx
CEC_LOGICAL_ADDRESS1[3:0] , Addr 80 (CEC), Address 0x28[7:4]
Logical Address 1—this address must be enabled by setting CEC_LOGICAL_ADDRESS_MASK[1] to 1.
Function
CEC_LOGICAL_ADDRESS1[3:0]
1111 (default)
xxxx
CEC_LOGICAL_ADDRESS0[3:0] , Addr 80 (CEC), Address 0x28[3:0]
Logical Address 0—this address must be enabled by setting CEC_LOGICAL_ADDRESS_MASK[0] to 1.
Function
CEC_LOGICAL_ADDRESS0[3:0]
1111 (default)
xxxx
CEC_LOGICAL_ADDRESS_MASK[2:0] , Addr 80 (CEC), Address 0x27[6:4]
Logical address mask of the CEC logical devices. Up to three logical devices are supported. When the mask bits are set for a particular
logical device, the logical device is enabled and messages whose destination address matches that of the selected logical address are accepted.
Function
CEC_LOGICAL_ADDRESS_MASK[2:0]
[4]
[5]
[6]
Description
Acknowledge received messages
Do not acknowledge received messages
Description
Default value
User specified logical address
Description
Default value
User specified logical address
Description
Default value
User specified logical address
Description
Mask bit for Logical Device 0
Mask bit for Logical Device 1
Mask bit for Logical Device 2
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Hardware User Guide