ST802RT1A Просмотр технического описания (PDF) - STMicroelectronics
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ST802RT1A Datasheet PDF : 58 Pages
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Registers and descriptors description
ST802RT1A, ST802RT1B
Table 17. RN07 [0d07, 0x07]: Auto-negotiation next page transmit register
Bit
Bit name
Description
Default
RW
type
15
Next Page
1 -> additional next page(s) will follow
0 -> last page
14 RESERVED --
0
RW
0
RW
13
Message Page
1 -> Message page transmitting
0 -> Unformatted page transmitting
12
Acknowledge 2
1 -> Local device will comply with message received
0 -> Local device cannot comply with message
1
RW
0
RW
1 -> Previous transmitted LCW toggle was 0
11
Toggle
0 -> Previous transmitted LCW toggle was 1
Updated by auto-negotiation state machines
0
RO
10:0
Message /
Unformatted
Code Field
It can be a message code (annex 28C, IEEE 802.3u) or 00000000
an unformatted code, according to value set in RN07[13] 001b
RW
Type
-
-
-
-
-
-
Next page: Indicates whether this is the last next page to be transmitted.
Msg page: Differentiates a message page from an unformatted page.
Ack2: Indicates that a device has the ability to comply with the message.
Toggle: Used by the arbitration function to ensure synchronization with the link partner
during next page exchange.
Message code field: An eleven-bit wide field, encoding 2048 possible messages.
Unformatted code field: An 11-bit wide field, which may contain an arbitrary value.
Table 18. RN08 [0d08, 0x08]: Auto-negotiation link partner received next page register
Bit
Bit name
Description
Default
RW
type
15
Next Page
1 -> LP desires next page transfer
0 -> LP has no more Next Pages
0
RO
14
Acknowledge
1 -> LP acknowledges reception of the ability data word
0 -> Not acknowledged
0
RO
13
Message Page
1 -> LP message page transmitting
0 -> LP unformatted page transmitting
0
RO
12
Acknowledge 2
1 -> LP will comply with message received
0 -> LP cannot comply with message
11
Toggle
1 -> Previous transmitted LP LCW toggle was 0
0 -> Previous transmitted LP LCW toggle was 1
0
RO
0
RO
10:0
Message /
Unformatted Code
Field
It can be a message code (annex 28C, IEEE 802.3u) or
an unformatted code, according to value set in RN08[13]
0000000
0000b
RO
Type
-
-
-
-
-
-
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Doc ID 17049 Rev 1
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