CX28344 Conexant, CX28344 Datasheet - Page 128

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

Registers
Default after reset: 00(h)
Direction: Read/Write
Modification: Bits 0–5: dynamic; Bit6: static
SSMEn
SSM[1]/TM
SSM[2:4]
MAPD[1:2]
3-16
Reserved
7
SSM Mode Enable—Set to enable usage of bit 8 in the MA byte as an SSM field and of bits 6–
7 in the MA byte as a multiframe indicator (MI) field. When cleared, bit 8 in the MA byte is
the timing marker (TM) field and bits 6–7 in the MA byte are used as payload dependent (PD)
field.
SSM MSB/Timing Marker Bit Field—When SSM mode is enabled (SSMEn bit is set), this bit
is the MS bit (transmitted first) to be sent in the SSM field (bit 8 in MA byte). When MI field
has a value of 00, SSM [1] is inserted in the frame. When SSM mode is disabled (SSMEn bit is
cleared), this bit is the timing marker. It is inserted on every frame in bit 8 position in the MA
byte.
SSM Bit Field—When SSM mode is enabled (SSMEn bit is set), set to the three LS bits
pattern to be sent in the SSM field (bit 8 of MA byte) according to the multiframe phase
indicated by MI field. When MI field has a value of 01, SSM [2] is inserted in the frame. When
MI field has a value of 10, SSM [3] is inserted in the frame. When MI field has a value of 11,
SSM [4] is inserted in the frame. When SSM mode is disabled, this field is ignored.
Payload Dependent Field in MA byte—When SSM mode is disabled (SSMEn bit in this
register is cleared) and ExtFEAC/PD bit in Transmit Overhead Insertion register 1 clears, this
field is sent in every frame in bits 6–7 of the MA byte. MAPD [1] bit transmits first. If SSM
mode is enabled or ExtFEAC/PD is set, this field is ignored.
SSMEn
6
Feature4 Control Register (CR07i)
NOTE:
SSM[1]/TM
5
Mindspeed Technologies™
This control register has an effect only in E3-G.832 mode. In DS3 and
E3-G.751 modes the content of this register is ignored.
SSM[2]
4
SSM[3]
3
SSM[4]
2
MAPD[1]
CX28342/3/4/6/8 Data Sheet
1
28348-DSH-001-B
MAPD[2]
0