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Each message begins with an address byte specifying the 4-bit initiator and recipient addresses. If two initiators begin transmitting at the same time, one of them will transmit a 0 bit while the other transmits a 1 bit, and the latter will observe the conflict and cease transmitting until the bus
94:
Data bits are 2.4±0.35 ms long, with 1 bits having a low period of 0.6±0.2 ms, and 0 bits having a low period of 1.5±0.2 ms. Receivers observe the data line at 1.05±0.2 ms after the falling edge to determine the bit's value.
141:
When a device is powered on, it chooses an address and sends a ping to see if that address is claimed by another device. If no acknowledge is received, the address is free and may be kept. Otherwise, the device tries another address.
101:
A transmitter must listen to the bus as it transmits; the receiver may hold it low, turning a transmitted 1 bit into a 0 bit. This is done, for example, to acknowledge a transmission.
195:
Smartlink may be referred to as
Megalogic, NexTView, T-V Link, Easylink, AV.Link, CinemaLink, or Q-Link. The VTX-D800U will operate any device which provides the compatible interface.
104:
If a receiver detects an error in the received data, it holds the bus low for 3.6±0.24 ms; this causes the transmitter to abort the message and retry from the beginning.
138:" to check if the addressed device exists and is powered on. Otherwise, it is followed by an opcode byte, and parameters as required by the opcode.
84:(ten devices at 100 pF each, plus nine cables at 700 pF), and signal transitions are correspondingly slow: 333 bit/s, with 50
168:
107:
A message consists of a start bit, followed by a series of data bytes. Each byte is actually transmitted as 10 bits:
80:
to 3 or 3.3 V, and may be pulled down by any device on the bus. Total bus capacitance is a maximum of 7300
210:
174:
215:
151:
117:
An acknowledge bit is transmitted as 1, but overwritten to a 0 bit by the receiver to acknowledge receipt.
98:
Every message begins with a special start bit, 4.5±0.2 ms long, with a low period of 3.7±0.2 ms.
53:
131:
is idle again. (Note that it must be prepared for the case that the incoming message is addressed to it.)
114:
An end-of-message bit is 0 to indicate that more bytes are being transmitted, or 1 to indicate not, and
91:
Each bit transferred begins with a falling edge. The duration of the low period determines the value.
135:
38:, etc., is a protocol to carry control information between audio-visual devices connected via the
120:
For broadcast messages, the acknowledge bit is inverted: it is overwritten to 0 if any receiver
8:
163:
77:
169:
HDMI Specification
Version 1.3a, Supplement 1: Consumer Electronics Control (CEC)
73:
204:
85:
182:
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46:
39:
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61:
57:
16:
Protocol for sending information using the SCART connector
202:
134:An address byte sent with EOM=1 is a simple "
67:
175:"Sony Freeview microsite - VTX-D800U FAQ"
164:Designing CEC into your next HDMI Product
111:8 data bits, most significant bit first,
203:
88:fall time and 250 μs rise time.
22:, also known under the trade names
13:
14:
227:
72:AV.Link uses a single wire in an
56:(CEC) communication channel in
181:. July 6, 2007. Archived from
1:
157:
152:Consumer Electronics Control
54:Consumer Electronics Control
7:
145:
42:(EIA Multiport) connector.
10:
232:
68:Electrical characteristics
211:Audiovisual connectors
45:It is standardised as
216:Television technology
76:configuration. It is
64:is based on AV.link.
185:on December 3, 2003
78:passively pulled up
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74:open collector
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187:. Retrieved
183:the original
140:
133:
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124:the message.
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106:
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90:
71:
51:
49:EN 50157-1.
44:
35:
31:
27:
24:nexTViewLink
23:
19:
18:
189:January 22,
205:Categories
158:References
28:SmartLink
146:See also
36:EasyLink
122:rejects
47:CENELEC
20:AV.link
32:Q-Link
40:SCART
191:2010
179:Sony
136:ping
62:PDMI
60:and
58:HDMI
52:The
207::
193:.
177:.
86:μs
82:pF
34:,
30:,
26:,
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