參數(shù)資料
型號(hào)： STLC5411P
廠商： 意法半導(dǎo)體
英文描述： 2B1Q U INTERFACE DEVICE
中文描述： 2B1Q U接口裝置
文件頁(yè)數(shù)： 34/72頁(yè)
文件大?。?/td> 739K
代理商： STLC5411P
TEST FUNCTIONS
Various test functions are providedfor transmitted
pulse waveform checking, power spectral density
measurement and transmitterlinearity.
Three commands in TXACTregisterare provided.
The associated test functionis enabled as long as
the command is not disabled by any other com-
mand.
SP1: (0010) SendSingle Pulses+1, -1:
+1, -1, pulses are transmitted consecutively onto
the line, one pulse per frame.
SP3: (1011) SendSingle Pulses+3, -3:
+3, -3, pulses are transmitted consecutively onto
the line, one pulse per frame.
RDT: (0011) Random Data Transmitted:
Random data can be transmitted onto the line
continously. B1, B2 and D channel transparency
between the digital interface and the line is en-
abled.
When auto-mode is selected, two test inputs
(TEST1, TEST2) are provided allowing the same
test functions as described above but without the
need of a microcontroller. See Table 6 for Test
pinsbiasing.
Table 6:
Test Pins
TEST1
1
1
0
0
TEST2
1
0
1
0
FUNCTIONS
Normal operation
Send Single Pulse
±
1
Random Data Transmitted
Send Single Pulse
±
3
TURNING ON AND OFF THE DEVICE
STLC5411 contains an automatic sequencer for
the complete control of the start-up activation se-
quences.Interactions with an externalcontrol unit
requires only Activate Request and Deactivate
Request commands, with the option of inserting
break-points in the sequence for additional exter-
nal control allowing for instanceeasy building of a
repetor application. Automatic control of act,
uoa/sai and dea bits in the M4 bit positionsis pro-
vided, along with the specified 40 ms, 480 ms and
15 s timers used during the sequencing.
Except the Power up and Power down control
that is slightly different, the Activation/Deactiva-
tion procedures are identical in GCI and Mi-
crowire/DSI modes. Same command codes or in-
dication codes are used. In Microwire and GCI
mode, activation control is done by writing in the
Activation Control Register TXACT and by read-
ing the Activation Indication Register RXACT. For
TXACT and RXACT access, MICROWIRE port is
used in MICROWIRE mode and C/I channel (or
MONITOR channel depending of CID bit in CR2
register) is used in GCI mode.
In MICROWIRE mode, a primitive indication gen-
erates first an interrupt requesting an action from
the Microprocessor, in GCI mode the primitive In-
dication is directly transmitted via C/I (or MONI-
TOR channel).
Power on initialization
Following
STLC5411 enters the power down deactivated
state in MICROWIRE mode or in GCI mode de-
pending on the polarization of the MW input.
All the internal circuits including the master oscil-
lator are inactive and in a low power state except
for the 10 kHz Tone signal detector. The line out-
puts LO+/LO- are low impedance and all digital
outputs are high impedance. All programmable
registers and the activation controller are reset to
their defaultvalue.
GCI configurationis defined by means of the con-
figuration pins M0, CONF1 and CONF2 when
Power supply is turned on.
For LT and NT1-2 equipments, GCI configuration
should be completed by means of Control Regis-
ter Programming. See Table 1 for configuration
pins bias.
the
initial
application
of
power,
Lineactivation request
When UID is in the power down state and a
10kHz tone TN or TL is detected from the line.
LSD and INT (MICROWIRE/DSI only) open drain
outputs are forcedto zero.
In NT configuration , code LSD (0000) is loaded
in the activation indicationregister RXACT.
In LT configuration, code AP (1000) is loaded in
the activationindicationregister RXACT.
In Microwire/DSI these indications are sent onto
CO at the following access even if the UID is still
in powerdown mode.
In GCI these indications are sent onto the C/I
channel as soon as GCI clocks areavailable.
LSD open drain output is set back in the high im-
pedance state as soon as the UID is poweredup.
INT open drain output is set back in the high im-
pedance statewhen CS input is detected at zero.
Depending of the ACTAUT and PUPAUT bits in
CR6 register, UID can powered up itself, also
automaticallyto startthe activation.
For all auto mode configurations, on 10KHz tone
reception, power up and activation procedure are
full automatic,but in NT1 auto, UID waits the uoa
bit from the line before to provide (or not) the
cloks and primitives to the S device.
Power up control
Microwire/DSI: control instruction PUP in
ACT
STLC5411
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