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參數(shù)資料
| 型號(hào)： | STLC5411 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2B1Q U Interface Device(2BIQ U接口裝置) |
| 中文描述： | 2B1Q U接口設(shè)備（2BIQ ü接口裝置） |
| 文件頁數(shù)： | 47/72頁 |
| 文件大?。?/td> | 738K |
| 代理商： | STLC5411 |
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Status Register (STATUS)
(Read only)
After reset: 85H
PWDN
X
X
X RXFFU RXFFO TXFFU TXFFO
PWDN
Powerdown
PWDN = 1: UID is in powerdown state
PWDN = 0: UID is in power up state
RXFFU
RX FIFO underflow
RXFFU= 1:The bits rate on Br pin is higher than
the bits rate sideline.
RXFFU= 0:The bits rate on Br is in accordance
with the bits rate side line
RXFFO:
RX FIFOoverflow
RXFFO = 1:The bits rate on Br pin is lower than
the bits rate sideline.
RXFFO = 0:The bits rate
accordance with the bits rate side
line.
TXFFU
TXFIFO underflow
on Br pin is in
TXFFU = 1: The bits rate on Bx pin is lower than
the bits rate sideline.
TXFFU = 0: The bits rate on Bx pin is in
accordance with the bits rate side
line.
TXFFO
Tx FIFO overflow
TXFFO = 1: The bits rate on Bxpin is higher than
the bits rate sideline.
TXFFO
The bits rate on Bx pin is in
accordance with the bits rate side
line.
When one of these four bits is set to 1, Tx FIFO
and/or Rx FIFO is re-adjusted and data is lost. An
interrupt or message is generated if FFIT bit in
CR4 register is set to 1. It is always possible to
read this register by writting STATUS bit = 1 in
RXOH register.
Transmit M4 channel register (TXM4)
After reset: 7DH
-
m42
X
m43
X
m44
X
m45
X
m46
X
-
m48
X
When transmitting SL2/SL3 or SN3, the UID shall
continuouslysend in the M4 channel field the reg-
ister content to the line once per superframe.
Register content is transmitted to the line at each
superframe.
m41
X
, m42
X
in LT, m47
X
are activation bits.
These bits are controlled directly by the on chip
activation encoder-decoder. The corresponding
bits inthe TXM4 register are not significant.
m45
X
in NT mode is CS0 bit: this is normally 0
(UID performing warm start). Nevertheless, user
can forceCSO to 1 by setting m45
X
to 1.
When a read back is operated on TXM4, m41x,
m42x in LT, m47x are indicatingthe current value
of act, dea in LT and uoa/sai bits transmitted to
the line.
Receive spare M4 overhead bits register
(RXM4)
(read only)
After reset: 75H
m41r
m42r
m43r
m44r m45r
m46r m47r
m48r
RXM4 Register is constituted of 8 bits. When the
line is fully activated (super frame synchronized),
STLC5411 extracts the M4 channel bits. m41 is
the act bit; m42 in NT mode is the dea bit; in NT
m47 is the uoa bit; in LT m47 is the sai bit. These
bits are under the control of the activation se-
quencer. No interrupt cycle is provided for the
RXM4 register when a change on one of the acti-
vation bits is detected; never the less, they are
availablein RXM4.
When one of the remaining received spare bits is
validated following the criteria selected in the
Configuration Register OPR, the RXM4 register
content is queuedin the interrupt register stack, if
no maskoverhead bits is set(see MOB bit in CR4
register). It is always possible to read this register
by writting RXM4 bit = 1 in RXOHregister.
Transmit
(TXM56)
After reset: 1FH
M5
and
M6
channels
register
-
-
-
m51
X
m61
X
m52
X
febx
febx
m51
X
, m61
X
, m52
X
spare over-head bits are nor-
mally equalto 1. Default value can be changedby
setting the respective bits. These bits are trans-
mitted to theline in SL2/SL3or SN3 signal.
febx
Transmitfebe bit control
The febe can be forced to 0 by writing 0 in one of
febxif RFS bitin CR6 register is setto 1. Thefebebit
set to zero is sent once to the line in the following
availablesuperframe. After febe transmission, febx
bit returns to 1; the two bits positionsare identical
and allow direct compatibility between UIDs set in
auto-mode (repeter).
Note: the febx bits in TXM56 register are not the
only way to force febe= 0 to the line.
First, the febx action is controlled by RFS bit in
CR6 register.
Second, the nebe = 0 (local crc cmputing result)
forces also febe = 0 to the line and this action is
controlled by LFS bit in CR6 register.
Third, TFB0 = 0 in CR6 registerforces permanen-
tely febe = 0 to the line.
STLC5411
47/72
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