3 transceiver t1 mode functional timing, Ransceiver, T1 m – Maxim Integrated DS33R11 User Manual
Page 303: Unctional, Iming, Figure 12-10. receive-side d4 timing, Figure 12-11. receive-side esf timing
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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RMII Receive data on RXD[1:0] is expected to be synchronous with the rising edge of the 50 MHz REF_CLK. The
data is only valid if CRS_DV is high. The external PHY asynchronously drives CRS_DV low during carrier loss.
Figure 12-9. RMII Receive Interface Functional Timing
RXD[1:0]
CRS_DV
REFCLK
P
R
E
A
M
B
L
E
F
C
S
12.3 Transceiver T1 Mode Functional Timing
Figure 12-10. Receive-Side D4 Timing
FRAME#
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
3
RSYNC
1
RSYNC
RFSYNC
2
RSYNC
NOTE 1: RSYNC IN THE FRAME MODE (TR.IOCR1.5 = 0) AND DOUBLE-WIDE FRAME SYNC IS NOT ENABLED (TR.IOCR1.6 = 0).
NOTE 2: RSYNC IN THE FRAME MODE (TR.IOCR1.5 = 0) AND DOUBLE-WIDE FRAME SYNC IS ENABLED (TR.IOCR1.6 = 1).
NOTE 3: RSYNC IN THE MULTIFRAME MODE (TR.IOCR1.5 = 1).
Figure 12-11. Receive-Side ESF Timing
1
2
3
4
5
6
7
8
9 10 11 12
1
2
3
RFSYNC
FRAME#
RSYNC
RSYNC
RSYNC
13 14 15 16 17 18 19 20 21 22 23 24 1
2
3
4
5
NOTE 1: RSYNC IN FRAME MODE (TR.IOCR1.4 = 0) AND DOUBLE-WIDE FRAME SYNC IS NOT ENABLED (TR.IOCR1.6 = 0).
NOTE 2: RSYNC IN FRAME MODE (TR.IOCR1.4 = 0) AND DOUBLE-WIDE FRAME SYNC IS ENABLED (TR.IOCR1.6 = 1).
NOTE 3: RSYNC IN MULTIFRAME MODE (TR.IOCR1.4 = 1).