參數(shù)資料
型號(hào): DS26521L+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 216/258頁(yè)
文件大?。?/td> 0K
描述: IC TXRX T1/E1/J1 64-LQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 160
類型: 線路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: T1/E1/J1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
包裝: 托盤
產(chǎn)品目錄頁(yè)面: 1430 (CN2011-ZH PDF)
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DS26521 Single T1/E1/J1 Transceiver
60 of 258
8.9.16 T1 Programmable In-Band Loop Code Detection
The DS26521 can generate and detect a repeating bit pattern from one to eight bits or 16 bits in length. This
function is available only in T1 mode.
Table 8-26. Registers Related to T1 In-Band Loop Code Detection
REGISTER
FRAMER
ADDRESSES
FUNCTION
Receive In-Band Code Control Register
082h
Used for selecting length of receive in-
band loop code register.
Receive Up Code Definition Register 1
0ACh
Receive up code definition register 1.
Receive Up Code Definition Register 2
0ADh
Receive up code definition register 2.
Receive Down Code Definition Register 1
0AEh
Receive down code definition register 1.
Receive Down Code Definition Register 2
0AFh
Receive up code definition register 2.
Receive Spare Code Register 1 (T1RSCD1)
09Ch
Receive spare code register 1.
Receive Spare Code Register 2 (T1RSCD2)
09Dh
Receive spare code register 2.
Receive Real-Time Status Register 3 (RRTS3)
0B2h
Real-time loop code detect.
Receive Latched Status Register 3 (RLS3)
092h
Latched loop code detect bits.
Receive Interrupt Mask Register 3 (RIM3)
0A2h
Mask for latched loop code detect bits.
The framer has three programmable pattern detectors. Typically, two of the detectors are used for “l(fā)oop-up” and
“l(fā)oop-down” code detection. The user programs the codes to be detected in the Receive Up Code Definition
registers (T1RUPCD1 and T1RUPCD2) and the Receive Down Code Definition registers (T1RDNCD1 and
T1RDNCD2). The length of each pattern is selected via the Receive In-Band Code Control register (T1RIBCC).
There is a third detector (Spare) and it is defined and controlled via the T1RSCD1/T1RSCD2 and T1RSCC
registers. When detecting a 16-bit pattern, both receive code definition registers are used together to form a 16-bit
register. For 8-bit patterns, both receive code definition registers are filled with the same value. Detection of a 1-,
2-, 3-, 4-, 5-, 6-, and 7-bit pattern only requires the first receive code definition register to be filled. The framer
detects repeating pattern codes in both framed and unframed circumstances with bit-error rates as high as 10E-2.
The detectors can handle both F-bit inserted and F-bit overwrite patterns. Writing the least significant byte of the
receive code definition register resets the integration period for that detector. The code detector has a nominal
integration period of 48ms. Thus, after about 48ms of receiving a valid code, the proper status bit (LUP, LDN, and
LSP) is set to 1. Note that real-time status bits, as well as latched set and clear bits, are available for LUP, LDN,
and LSP (RRTS3 and RLS3). Normally codes are sent for a period of 5 seconds. It is recommended that the
software poll the framer every 50ms to 100ms until 5 seconds has elapsed to ensure that the code is continuously
present.
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DS26521L+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 1-Port E1/T1/J1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS26521LN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 1-Port E1/T1/J1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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