cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 187

• Manufacturer Part Number: cx29503
• Description: Cx29503 Broadband Access Multiplexer Data Sheet
• Manufacturer: Mindspeed Technologies

CX29503 Data Sheet
8.3.2.8
0x70—Transmit Framer Configuration (TCR0)
TCR0 selects the offline framer's criteria for recovery of transmit frame alignment and determines the output of
the transmit frame and alarm formatters overhead bits. In addition, TCR0 works in conjunction with TCR1
[addr: 071] and TFRM [addr: 072] to select the transmit online frame monitor's criteria for LOF alignment and
which overhead bits are supplied by the transmit frame and alarm formatters.
EXMOP_EN
TINCF
TFRAME[3:0]
Table 8-23. E1 Transmit Framer Modes (T1/E1N = 0)
29503-DSH-002-B
TFRAME
00XX
01XX
—
7
Framer Mode
Enable External MOP—Overwrites the currently active BOP data with the external MOP data.
Transmit CRC6 includes F-bit—Determines if the F-bit is included in the CR6 remainder
calculation in T1 mode (T1/E1N = 1). This bit is ignored in E1 mode (T1/E1N = 0).
The Frame formatter generates Ft, Fs, FPS, FAS, MFAS, and CRC bits. The Alarm formatter
generates YB2, YJ, Y0, and Y16 bits. Frame and alarm overhead formats are selected by
TFRAME[3:0] and T1/E1N settings as given in
capable of being generated manually, automatically [TALM; addr: 075], or bypassed
[INS_MYEL; addr: 072].
the Sa-Byte registers [addr: 07B–07F] or the TSB interface. The Frame formatter does not
generate FDL overhead. To insert FDL, the processor does one of the following:
FAS + CRC
FAS only
—
The Frame formatter does not generate Sa-bit overhead. These bits are either supplied by
6
• configures TDL1 [addr: 0AD] to operate over the F-bit channel during odd frames
• manually programs TDL1 to send each message
• sets up the external data link [DL3_TS; addr: 015] to use the TSB interface
Digital Transmitter Registers
Unused bits are reserved and should be written to 0.
0 = T1 ESF CRC6 calculation is performed on the transmit data including a 1 in place
1 = T1 ESF CRC6 calculation is performed on the transmit data including the F-bit
[DL1_TS; addr: 0A4] and Automatic Performance Report messages
[AUTO_PRM; addr: 0AA]
of the F-bit
EXMOP_EN
5
MFAS
Yes
1s
Mindspeed Technologies™
Preliminary Information
TINCF
4
TS0 Overhead Insertion
FEBE
Yes
1s
TFRAME[3]
3
CRC4
Yes
1s
Tables 8-23
TFRAME[2]
2
FAS
Yes
Yes
and 8-24. Each yellow alarm is
TFRAME[1]
1
YEL
Y0
Y0
Yellow Alarms
Register Description
TFRAME[0]
MYEL
0
—
—
8
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