4.0 Registers
4.8 Transmit Bit Stuffing Thresholds
RS8953B/8953SPB
HDSL Channel Unit
0xD4—Bit Stuffing Threshold C (STF_THRESH_C_HI)
7
—
6
—
5
—
4
—
3
—
2
—
1
0
STF_THRESH_C[9:8]
STF_THRESH_C[8:0]
Bit Stuffing Threshold C—Contains the number of GCLK cycles equal to 24 HDSL bit times.
If the phase measured from PCM to HDSL 6 ms frames is a positive value less than
STF_THRESH_C, then 4 STUFF bits are inserted in the outgoing frame. If the phase is a
positive value greater than or equal to STF_THRESH_C, then the phase tolerance on HDSL,
PCM, or GCLK inputs is exceeded and the STUFF generator reports STUFF_ERR
[STATUS_3; addr 0x07].
NOTE:
STF_THRESH_C must be greater than STF_THRESH_B by a value of 4 HDSL bit
times (4 x HDSL
÷
GCLK) but not greater than a value of 0x3FF.
4-34
Conexant
N8953BDSB
CONEXANT [ CONEXANT SYSTEMS, INC ]
