參數(shù)資料
型號: IDT82V2041EPPG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 27/75頁
文件大?。?/td> 0K
描述: IC LIU T1/J1/E1 1CH 44-TQFP
標準包裝: 80
類型: 線路接口裝置(LIU)
規(guī)程: E1
電源電壓: 3.13 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 44-LQFP
供應商設備封裝: 44-TQFP(10x10)
包裝: 托盤
其它名稱: 82V2041EPPG
IDT82V2041E
SINGLE CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
Functional Description
33
December 9, 2005
Manual Report Mode
In Manual Report Mode, the internal Error Counter starts to count the
received errors when the CNT_MD bit (MAINT6, 13H) is set to ‘0’. When
there is a ‘0’ to ‘1’ transition on the CNT_TRF bit (MAINT6, 13H), the data
in the counter will be transferred to (CNT0, 1BH) and (CNT1, 1CH), then
the counter will be reset. The errors occurred during the transfer will be
accumulated to the next round. If the counter overflows, a counter overflow
interrupt indicated by CNT_OV_IS bit (INTS1, 1AH) will be generated if it
is not masked by CNT_IM bit (INTM1, 15H).
Figure-17 Manual Report Mode
Note: It is recommended that users should do the followings within next round of
error counting: Read the data in CNT0 and CNT1; Reset CNT_TRF bit for
the next ‘0’ to ‘1’ transition on this bit.
3.9.3
BIPOLAR VIOLATION AND PRBS ERROR INSERTION
Only when three consecutive ‘1’s are detected in the transmit data
stream,willa‘0’to‘1’transitionontheBPV_INSbit(MAINT6,13H)generate
a bipolar violation pulse, and the polarity of the second ‘1’ in the series will
be inverted.
A ‘0’ to ‘1’ transition on the EER_INS bit (MAINT6, 13H) will generate a
logic error during the PRBS/QRSS transmission.
3.10 LINE DRIVER FAILURE MONITORING
The transmit driver failure monitor can be enabled or disabled by setting
DFM_OFF bit (TCF1, 06H). If the transmit driver failure monitor is enabled,
the transmit driver failure will be captured by DF_S bit (STAT0, 17H). The
transition of the DF_S bit is reflected by DF_IS bit (INTS0, 19H), and, if
enabled by DF_IM bit (INTM0, 14H), will generate an interrupt. When there
is a short circuit on the TTIP/TRING port, the output current will be limited
to 100 mA (typical), and an interrupt will be generated.
In hardware control mode, the transmit driver failure monitor is always
enabled.
A '0' to '1' transition
on CNT_TRF?
counting
Manual Report mode
(CNT_MD=0)
CNT0, CNT1
data in
counter
0
Y
N
next round
repeat the
same process
Read the data in CNT0,
CNT1 within next round1
Reset CNT_TRF for the
next '0' to '1' transition
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