cx28365 Mindspeed Technologies, cx28365 Datasheet - Page 154

• Manufacturer Part Number: cx28365
• Description: X12, X6, X4 T3/e3 Framer And Atm Cell Transmission Convergence Sublayer Processor
• Manufacturer: Mindspeed Technologies

Registers
3.4.1
0x24—CR04 (Feature1 Control Register)
TxAMI
RxAMI
NRZMod
FEBEC/PT[1:3]
3-44
TxAMI
7
Transmit AMI Mode—Set high to enable AMI line coding on TxPOSO and TxNEGO (no B3ZS/
HDB3 encoding or decoding). When cleared, B3ZS/HDB3 line coding is used on these pins.
Receive AMI Mode—Set high to enable AMI line coding on RxPOSI and RxNEGI (no B3ZS/
HDB3 encoding or decoding). When cleared, these pins use B3ZS/HDB3 line coding.
NRZ Mode—Set high to disable bipolar (B3ZS/HDB3 or AMI) encoding or decoding and
provide a unipolar NRZ line code on TxPOSO/TxNEGO and RxPOSI/RxNEGI. Setting this
bit disables and bypasses the encoder and decoder circuits. The unipolar output appears at the
TxPOSO pin while TxNEGO pin is continuously low, and the clock is available on TCLKO
pin. The unipolar input should appear on RxPOSI, while RxNEGI can be tied to the LCV
output of the LIU and be used as an increment control of the LCV counter.
FEBE Pattern/Payload Type Bit Field—In DS3 mode set to the 3-bit sequence that is sent each
time a FEBE indication is transmitted in C-bit parity mode. This pattern is automatically
transmitted when the ExtFEBE/Cj-bit in the Transmit Overhead Insertion 1 Control register is
cleared, and the receiver detects a framing or path parity error. This pattern must not be all 1s
to indicate a FEBE to the far end. An all-1s pattern disables FEBE transmission and should not
be used for any other purpose. In E3-G.832 mode set to the 3-bit pattern that is transmitted
every frame in the payload type field in the MA byte.
RxAMI
Feature Control Registers
6
Default after reset: 07
Direction: Read/Write
Modification: Bits 0–2: dynamic; bits 5–7: static
NOTE:
NOTE:
NRZMod
Preliminary Information/Mindspeed Proprietary and Confidential
NRZMod
0
0
0
0
1
5
Mindspeed Technologies™
This bit is effective only when NRZMod bit is cleared.
This bit is effective only when NRZMod bit is cleared.
RxAMI
X
X
X
0
1
—
4
TxAMI
X
X
X
0
1
B3ZS/HDB3 encoded data on RxPOSI, RxNEGI
AMI encoded data on RxPOSI, RxNEGI
B3ZS/HDB3 encoded data on TxPOSO,
AMI encoded data on TxPOSO, TxNEGO
NRZ data on TxPOSO, RxPOSI; TxNEGO is set
—
3
TxNEGO
to 0; RxNEGI is used as an LCV input from
the LIU (if unused, should be tied low)
FEBEC/PT[1]
2
Description
FEBEC/PT[2]
1
CX28365/6/4 Data Sheet
FEBEC/PT[3]
0
500028C