STLC5412FN STMICROELECTRONICS [STMicroelectronics], STLC5412FN Datasheet - Page 46

• Manufacturer Part Number: STLC5412FN
• Description: 2B1Q U INTERFACE DEVICE ENHANCED WITH DECT MODE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STLC5412
CTC Corrupted Transmit CRC Control
Configuration Register 5 (CR5)
Significant in GCI only.
After reset: FFH
IO4, IO3, IO2, IO1 Input/Outputselect for I/O pins
(14, 15, 16, 18)
D4, D3, D2, D1 I/O pin logical level com-
mand/status.
D4, D3, D2, D1 bits are associated with IO4, IO3,
IO2, IO1 pins respectively. When IOi pin is selected
as an output, the associated Di bit can be written to
control the logical level of the output; Di equals 1
commands a high level on IOi. When IOi pin is se-
lected as an input, the associated Di bit indicates
the status of the input; Di equals one indicates a
high level on IOi. CR5 register is buffered in the in-
terrupt stack each time a status change is detected
on an input. It is also possible to read-back at any
time CR5.
Configuration Register 6 (CR6)
After reset: 0FH
T15E Timer 15 seconds extension
Note: the T15D bit in CR3 register enables or dis-
ables the T4/T5 timer independently of theT15E
bit.
46/74
T15E
MOB = 1: All interrupts issued from RXM4,
CTC = 0: Allows the normal calculation of the
CTC = 1: The CRC result transmitted to the line
IOi = 1: IOi pin is selected as an input. An on-
IOi = 0: IOi pin is selected as an output.
T15E = 0: The on chip T4 or T6 timer is done for
T15E = 1: The on chip T4 or T5 timer is
IO4
ACTA
IO3
chip pull up resistor ensures a stable
logical 1 at power-on reset or if IOi pin
is not connected to stable source.
Each
independently from the others.
UT
CRC for the transmitted data to the line.
in the next Superframe is inverted.
This ensure transmission of corrupted
CRC as long as CTC equal 1.
RXM56
masked. It is still possible to read
these registers via RXOH.
the ANSI standard: 15 seconds.
extended to 20 seconds.
IO2
PUPAUT
I/O
IO1
RXEOC
pin
QM AIS
D4
can
and
D3
TFB0
be
CR5
D2
RFS LFS
selected
D1
are
ACTAUT: Activation Automatic
PUPAUT PUP Automatic
Notes if ACTAUT is also set to 1, from a power
down state a 10KHz tone automatically starts the
activation.
QM Quiet mode.
AIS Analog Interface Select.
TFB0 Transmit febe equal 0
RFS Remote febe select.
Please report to the figure 10. RFS is useful in
repetor application to transfert or not the anoma-
lies from the second line section to the first line
section and viceversa.
ACTAUT = 1: If UID is powered up, a 10KHz
ACTAUT = 0 A detection of a 10KHz tone from
PUPAUT = 1: A 10KHz tone from the line allows
PUPAUT = 0: A detection of a 10KHz tone from
QM = 1: has the same effect of the QM primitive
QM = 0: no effect.
AIS = 1: selects an analog interface using 27mh
AIS = 0: selects an analog interface using 15mh
TFB0 = 0: A permanent febe bit = 0 is sent on
TFB0 = 1: The febe bit sent on the line is
command enterred in TXACT register.
An or logic is done with the QM bit and
the QM primitive. The goal of this bit is
to allow a quiet mode for an UID in
power down state in some applications.
transformer.
transformer
the line as long as TFB0 = 0
normaly computed.
the line does not power up the
device: UID waits a PUP primitive
command.
an automatic power up of the UID.
tone from the line starts the
activation without need of extra
commands (like AR), except when
QM (Quiet mode) is enterred.
the
activation: UID waits a primitive
command (normaly AR).
line does
not
start the