Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
- Destination Port 0 to 7 – 8x7 bits. Local Port of the intended receiver of the Data Token. If Destination Port
X is not used, it shall be set to 0. At least one of the destination ports shall be different to 0.
The implementation of this type of token is optional.
7
Always MUST be
set to 0
Always MUST be
set to 0
6
Type
Single Validity
Always MUST be
set to 0
Always MUST be
set to 0
Always MUST be set to 0
Always MUST be
set to 0
Always MUST be
set to 0
Always MUST be
set to 0
Always MUST be
set to 0
4.4.2.10 Clock Token
The Clock Token has the following fields:
5
4
5F
73
EE
E2
Submission page 126 UPA-OPERA
3
Destination Port 0
Validity [7:0]
Destination Port 1
Always MUST be set to 0
2
Validity [11:8]
Destination Port 2
Destination Port 3
Unused Frame Symbols [12:8]
Unused Frame Symbols [7:0]
Destination Port 4
Destination Port 5
Destination Port 6
Destination Port 7
Always MUST be set to 0
Always MUST be set to 0
Always MUST be set to 0
Always MUST be set to 0
Always MUST be set to 0
Figure 49 Non-returnable Data Token
- Preamble – 32 bits. The preamble is equal to 0x5F73EEE2.
- Type – 4 bits. Type shall be CLOCK (3)
- Reset – 1 bit. If set to 1 all nodes reset the timers and data.
- Grid Frequency – 2 bits: 00 = 50 Hz , 01= 60Hz, 11 = Other.
1
0
preamble
- MaximumlTimerValue – 16 bits: number of cycles of a 312.5 kHz clock used by the Master to count 9