PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
TPSC Internal Registers 01-18H: PCM Data Control byte
Bit
Type
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R/W
R/W
INVERT
IDLC
DMW
SIGNINV
Unused
Unused
ZCS0
R/W
R/W
ZCS1
INVERT:
When the INVERT bit is set to a logic 1, data from the BTPCM input is
inverted for the duration of that channel.
SIGNINV:
When the SIGNINV bit is set to a logic 1, the most significant bit from the
BTPCM input is inverted for that channel.
The INVERT and SIGNINV can be used to produce the following types of
inversions:
Table 12
-TPSC INVERT and SIGNINV Functions
INVERT
SIGNINV
Effect on PCM Channel Data
0
1
0
0
PCM Channel data is unchanged
All 8 bits of the PCM channel data are
inverted
0
1
1
1
Only the MSB of the PCM channel data is
inverted (SIGN bit inversion)
All bits EXCEPT the MSB of the PCM channel
data is inverted (Magnitude inversion)
IDLC:
When the IDLC bit is set to a logic 1, data from the IDLE Code Byte replaces
the BTPCM input data for the duration of that channel.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
133
PMC [ PMC-SIERRA, INC ]
