TLC32044C Datasheet, PDF (15/39 Pages) Texas Instruments – VOICE-BAND ANALOG INTERFACE CIRCUITS

TLC32044C, TLC32044E, TLC32044I, TLC32044M, TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
ignored if the adjustment command is sent during a receive conversion period, which is already being or will
be adjusted due to a prior adjustment command. For example, if adjustment commands are issued during
transmit conversion periods A, B, and C, the first two commands can cause receive conversion periods A and
B to be adjusted, while the third receive adjustment command is ignored. The third adjustment command is
ignored since it was issued during receive conversion period B, which already is adjusted via the transmit
conversion period B adjustment command.
t1
FSX
FSR
Transmit
Conversion
Period A
t2
Transmit
Conversion
Period B
Transmit
Conversion
Period C
Receive Conversion Period A
Receive Conversion Period B
Figure 3. Receive and Transmit Conversion Period Adjustments
asynchronous operation — more than one set of primary and secondary DX serial communication
occurring between two receive frame sync (see AIC DX data word format section)
The TA, TA’, TB, and control register information that is transmitted in the secondary communications is always
accepted and is applied during the ongoing transmit conversion period. If there is sufficient time between t₁ and
t₂, the TA, RA’, and RB register information, which is sent during transmit conversion period A, is applied to
receive conversion period A. Otherwise, this information is applied during receive conversion period B. If RA,
RA’, and RB register information has already been received and is being applied during an ongoing conversion
period, any subsequent RA, RA’, or RB information that is received during this receive conversion period is
disregarded (see Figure 4).
Primary
t1
Secondary
Primary
Secondary
Primary
Secondary
FSX
FSR
Transmit
Conversion
Period A
t2
Transmit
Conversion
Period B
Transmit
Conversion
Period C
Receive Conversion
Period A
Receive Conversion Period B
Figure 4. Receive and Transmit Periods for Primary and Secondary Data
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