Datasheet

____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
244 of 366
Register Name:
Sa6CODE
Register Description:
Receive Sa6 Codeword (E1 Mode Only)
Register Address:
base address + 0x1BC
Bit # 7 6 5 4 3 2 1 0
Name - - - -
Sa6CODE3 Sa6CODE2 Sa6C0DE1 Sa6CODE0
Default 0 0 0 0 0 0 0 0
Bits 3 to 0: Sa6 Codeword Bits (Sa6CODE[3:0]). This field reports the received Sa6 codeword per ETS 300 233.
The bits are monitored on a sub-multiframe asynchronous basis, so the pattern reported could be one of multiple
patterns that represent a valid codeword. The table below indicates which patterns reported in this register
correspond to a given valid Sa6 codeword. See section 10.11.5.3.
Valid Sa6 Code
Possible Reported Patterns
Sa6_8 1000, 0100, 0010, 0001
Sa6_A 1010, 0101
Sa6_C 110, 0110, 0011, 1001
Sa6_E 1110, 0111, 1011, 1101
Sa6_F 1111
Register Name:
RMMR
Register Description:
Receive Master Mode Register
Register Address:
base address + 0x200
Bit # 7 6 5 4 3 2 1 0
Name FRM_EN INIT_DONE - - - - SFTRST E1/T1
Default 0 0 0 0 0 0 0 0
Bit 7: Framer Enable (FRM_EN). This bit must be set to the desired state before setting the INIT_DONE bit.
0 = Rx framer disabled (held in low-power state)
1 = Rx framer enabled (all features active)
Bit 6: Initialization Done (INIT_DONE). The CPU must set the E1/T1 and FRM_EN bits prior to setting this bit.
After INIT_DONE is set, the receiver is enabled if FRM_EN = 1.
Bit 1: Soft Reset (SFTRST). Level-sensitive reset. Should be set to 1, then to 0 to reset and initialize the Rx
framer.
0 = Normal operation
1 = Hold the Rx framer in reset
Bit 0: Receiver E1/T1 Mode Select (E1/T1). This bit specifies the operating mode for the Rx framer only. The
TMMR:E1/T1
bit specifies the operating mode for the transmit formatter. This bit must be set to the desired value
before setting the INIT_DONE bit.
0 = T1 operation
1 = E1 operation