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參數(shù)資料
| 型號： | DS2174QN+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/24頁 |
| 文件大小： | 0K |
| 描述： | IC BERT ENHANCED 44-PLCC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 26 |
| 功能： | 增強(qiáng)型位誤碼率測試器（EBERT） |
| 接口： | E1，J1，T1 |
| 電路數(shù)： | 1 |
| 電源電壓： | 3 V ~ 3.6 V |
| 電流 - 電源： | 50mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 44-PLCC（16.59x16.59） |
| 包裝： | 管件 |
| 包括： | 錯(cuò)誤計(jì)數(shù)器，樣式發(fā)生器和檢測器 |
DS2174
15 of 24
3.2 Status Register
The status register contains information about the real-time status of the DS2174. When a particular event
has occurred, the appropriate bit in the register is set to a 1. All of the bits in this register (except for
SYNC) operate in a latched fashion, which means that if an event occurs and a bit is set to a 1, it remains
set until the user reads the register. For the BED, BCOF, and BECOF bits, they are cleared when read and
are not set again until the event has occurred again. For RLOS, RA0, and RA1 bits, they are cleared when
read if the condition no longer persists.
Status Register (Address = 4h)
(MSB)
(LSB)
—
RA1
RA0
BED
BECOF
BCOF
RLOS
SYNC
SYMBOL
FUNCTION
—
Not Assigned. Could be any value.
RA1
Receive All 1s. Set when 40 consecutive 1s are received in pseudorandom mode.
Allowed to be cleared when a 0 is received.
RA0
Receive All 0s. Set when 40 consecutive 0s are received in pseudorandom mode.
Allowed to be cleared when a 1 is received.
BED
Bit Error Detection. Set when bit error count is non-zero. Cleared when read.
BECOF
Bit Error Count Overflow. Set when the bit error counter overflows. Cleared when
read.
BCOF
Bit Counter Overflow. Set when the bit counter overflows. Cleared when read.
RLOS
Receive Loss-of-Sync. Set when the receiver is searching for synchronization.
Remains set until read once sync is achieved. This bit is latched.
SYNC
Sync. Real-time status of the synchronizer. This bit is not latched.
3.3 Pseudorandom Pattern Registers
Note: Bit 1 of Control Register 4 determines if the addresses point to the tap select or seed registers.
The tap select register is used to select the length and tap positions for pseudorandom
generation/reception. Each bit that is set to a 1 denotes a tap at that location for the feedback path. The
highest bit location set to a 1 is the length of the shift register. All pattern lengths are available in bit
mode, patterns 24 – 1 and greater are available in nibble mode, and patterns 28 – 1 and greater are
available in byte mode. The pattern generator generates all 1’s if the exponent in the polynomial is less
than 4 (nibble mode) or 8 (byte mode).
For example, to transmit/receive 215 – 1 (O.151) Bit14 and Bit13 would be set to a 1. All other bits would
be 0. Table 3-C gives tap select and seed values for many pseudorandom patterns. The seed value is
loaded into the transmit shift register on the rising edge of TL (CR1.0).
Tap Select/Seed Value Registers (Address = 5h–8h)
(MSB)
(LSB)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
BIT23
BIT22
BIT21
BIT20
BIT19
BIT18
BIT17
BIT16
BIT31
BIT30
BIT29
BIT28
BIT27
BIT26
BIT25
BIT24
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2175SN+ | IC ELASTIC STORE T1/CEPT 16-SOIC |
| DS2176QN | IC BUFFER RECEIVE T1 IND 28-PLCC |
| DS2180AQN+T&R | IC TRANSCEIVER T1 44-PLCC |
| DS2181AQN+ | IC TXRX CEPT PRIMARY RATE 44PLCC |
| DS2186S/T&R | IC TRANSMIT LINE INTERFC 20-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2174QN/T&R+ | 制造商:Maxim Integrated Products 功能描述:BIT ERROR RATE TESTER 44PLCC - Tape and Reel |
| DS2174QN/T&R | 功能描述:電信集成電路 RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| DS2174QN+ | 功能描述:電信集成電路 Enhanced Bit Error Rate Tester (BERT) RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| DS2174QN+T&R | 制造商:Maxim Integrated Products 功能描述:BIT ERROR RATE TESTER 44PLCC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC BERT ENHANCED 44-PLCC 制造商:Maxim Integrated Products 功能描述:Telecom ICs Enhanced Bit Error Rate Tester (BERT) |
| DS2174QN+T&R | 功能描述:電信集成電路 Enhanced Bit Error Rate Tester (BERT) RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
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