st5451d STMicroelectronics, st5451d Datasheet - Page 9

• Manufacturer Part Number: st5451d
• Description: 2b1q U Interface Device
• Manufacturer: STMicroelectronics

PIN FUNCTIONS (specific GCI mode)
MULTIPLE FUNCTION PIN DESCRIPTION
Pin 6: FSa
(*) Only true if ANATST (internal test signal) = 0
Pin
22
25
26
27
MW(pin) = 1
MW(pin) = 0
Name
LSDb
RESb
SFSr
RFS
AIS
M0
MO(pin) = 1
MO(pin) = 0
Function or In/Out conditions (*)
In/Out
Out
Out
In
In
In
In
Remote febe select:
When tied to 0 the remote febe is not transferred. When tied to 1 febe is
transparently reported. See figure 10.
Analog interface select for all auto mode configurations
Rx Super frame synchronization. The rising edge of SFSr indicates the
beginning of the received superframe on the line. UID provides this output
only when ESFR bit in CR4 register is to 1 and LT/NT12 or NT/TE
configuration is done.
Line Signal Detect output (default conf.): This pin is an open drain output
which is normally in the high impedance state but pulls low when the device
previously in the power down state receives a wake-up by Tone from the
line. This signal is intended to be used to wake-up a micro-controller from a
low power idle mode. The LSD output goes back in the high impedance
state when the device is powered up.
Reset input pin with internal pull-up resistor. When pulled low, all registers
of the UID are reset to their default values. UID is configured according to
configuration inputs bias excluding MW input which must be maintained at
the 0 volt. minimum recommended pulse length is 200 s.
Configuration input pin. When pulled low, GCI channel assigner is selected
(channel number defined by inputs S0, S1, S2). When pulled high, UID is
configured by pins CONF1 and CONF2.
CONF2(pin) = 1
CONF2(pin) = 0
CMS(cr1) = 1
CMS(cr1) = 0
CONF1(pin) = 1
CONF1(pin) = 0
CONF1(pin) = 1
CONF1(pin) = 0
Description
Function
FSa
FSa
FSa
FSa
FSa
FSa
FSa
STLC5411
In/Out
Out
Out
Out
Out
In
In
In
9/72