TMPM330 - Keil

11.3.1.3 Preconfiguration
Under development
TMPM330 (rev0.4)11-19
TMPM330
Before receiving data, reception settings to the Logical Address Register , the Receive
Control Register 1 , the Receive Control Register 2 and the Receive
Control Register 3 are required.
(1) Logical Address Configuration
Configure logical address assigned to this product to the CECADD register. Multiple addresses
can be set simultaneously since every bit in this register corresponds with each address.
(Note) A broadcast message is received regardless of the CECADD register setting.
By allocating a logical address of a device to 15, logical “0” is sent as an ACK
response to the broadcast message.
(2) Noise Cancellation Time
The noise cancellation time is configurable with the bits of the
CECRCR1 register. You can configure the time to detect “1” and “0” respectively.
It is considered as noise if “1”s or “0”s of the same number as the specified value are not sampled.
A CEC line is monitored at each rising edge of a sampling clock. In the case that the CEC line is
changed from ”1” to “0”, the change is fully recognized if “0”s of the same number as specified in the
bit are monitored. In the case that the CEC line is changed from ”0” to “1”, the change
is fully recognized if “1”s of the same number as specified in the bit are sampled.
The following illustrates the operation of a case that a noise cancelling is configured as =10 (3 cycles) and =011 (4 cycles). By cancelling the noise, a signal “1” shifts to
“0” after “0” is sampled four times. The signal “0” shifts to “1” after “1” is sampled three times.
CECHNC [1:0] =10 (3 cycles)
CECLNC [2:0] =011 (4 cycles)
CEC line
Sampling
timing
After noise cancellation
CEC