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TS5070FNTR Datasheet(PDF) 10 Page - STMicroelectronics

Part # TS5070FNTR
Description  PROGRAMMABLE CODEC/FILTER COMBO 2ND GENERATION
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS5070FNTR Datasheet(HTML) 10 Page - STMicroelectronics

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This mode provides another stage of path verifica-
tion by enabling data written into the Receive PCM
Register to be read back from that register in any
Transmit time-slot at DX0or DX1.
For Analog Loopback as well as for Digital Loop-
back PCM decoding continues and analog output
appears at VFRO. The output can be disabled by
pro gramming ”No Output” in the Receive Gain
Register (see table 8).
INTERFACE LATCH DIRECTIONS
Immediately following power-on, all Interface
Latches assume they are inputs, and therefore all
IL pins are in a high impedance state. Each IL pin
may be individually programmed as a logic input or
output by writing the appropriate instruction to the
LDR, see table 1 and 4. Bits L5-L0 must be set by
writing the specific instruction to the LDR with the
L bits in the second byte set as specified in table 4.
Unused interface latches should be programmed
as outputs. For the TS5071, L5 should always be
programmed as an output.
(*) State at power-on initilization.
Note: L5 should be programmed as an output for the TS5071.
INTERFACE LATCH STATES
Interface Latches configured as outputs assume
the state determined by the appropriate data bit in
the 2-byte instruction written to the Latch Content
Register (ILR) as shown in tables 1 and 5.
Latches configured as inputs will sense the state
applied by an external source, such as the Off-
Hook detect output of a SLIC. All bits of the ILR,
i.e. sensed inputs and the programmed state of
outputs, can be read back in the 2nd byte of a
READ from the ILR. It is recommended that, dur-
ing initialization, the state of IL pins to be config-
ured as outputs should first be programmed, fol-
lowed
immediately
by
the
Latch
Direction
Register.
TIME-SLOT ASSIGNMENT
COMBO IIG can operate in either fixed time-slot or
time-slot assignment mode for selecting the Trans-
mit and Receive PCM time-slots. Following power-
on, the deviceis automaticallyin Non-Delayed Tim-
ing mode, in which the time-slot always begins with
the leading (rising) edge of frame sync inputs FSX
and FSR. Time-Slot Assignment may only be used
with Delayed Data timing : see figure 6. FSX and
FSR may have any phase relationship with each
other in BCLK period increments.
Bit Number
765
43
210
L0
L1
L2
L3
L4
L5
X
X
Table 4: Byte 2 Function of Latch Direction Register
LN Bit
IL Direction
0
1
Input
*
Output
Bit Number
Function
7
EN
6
PS
(note 1)
5
T5
(note 2)
4
T4
3
T3
2
T2
1
T1
0
T0
0
X
X
XXXXX
Disable DX Outputs (transmit instruction) *
Disable DR Inputs (receive instruction) *
10
Assign One Binary Coded Time-slot from 0–63
Assign One Binary Coded Time-slot from 0–63
Enable DX0 Output, Disable DX1 Output
(Transmit instruction)
Enable DR0 Input, Disable DR1 Input
(Receive Instruction)
11
Assign One Binary Coded Time-slot from 0–63
Assign One Binary Coded Time-slot from 0–63
Enable DX1 Output, Disable DX0 Output
(Transmit instruction)
Enable DR1 Input, Disable DR0 Input
(Receive Instruction)
Table 6: Byte 2 of Time-slot and Port Assignment Instructions
Bit Number
7654
32
10
D0
D1
D2
D3
D4
D5
X
X
Table 5: Interface Latch Data Bit Order
Notes:
1. The ”PS” bit MUST always be set to 0 for the TS5071.
2. T5 is the MSB of the time-slot assignment.
(*) State at power-on initialization
TS5070 - TS5071
10/32


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