參數(shù)資料
型號(hào): DS21Q42TN
廠商: Maxim Integrated Products
文件頁數(shù): 41/116頁
文件大?。?/td> 0K
描述: IC FRAMER ENHANCED T1 4X 128TQFP
標(biāo)準(zhǔn)包裝: 72
控制器類型: T1 調(diào)幀器
接口: 并行/串行
電源電壓: 2.97 V ~ 3.63 V
電流 - 電源: 75mA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP
供應(yīng)商設(shè)備封裝: 128-LQFP(14x20)
包裝: 管件
DS21Q42
30 of 116
TCR2: TRANSMIT CONTROL REGISTER 2 (Address=36 Hex)
(MSB)
(LSB)
TEST1
TEST0
TZBTSI
TSDW
TSM
TSIO
TD4YM
TB7ZS
SYMBOL
POSITION
NAME AND DESCRIPTION
TEST1
TCR2.7
Test Mode Bit 1 for Output Pins. See Table 6–1.
TEST0
TCR2.6
Test Mode Bit 0 for Output Pins. See Table 6–1.
TZBTSI
TCR2.5
Transmit Side ZBTSI Enable.
0 = ZBTSI disabled
1 = ZBTSI enabled
TSDW
TCR2.4
TSYNC Double–Wide. (note: this bit must be set to zero when
TCR2.3=1 or when TCR2.2=0)
0 = do not pulse double–wide in signaling frames
1 = do pulse double–wide in signaling frames
TSM
TCR2.3
TSYNC Mode Select.
0 = frame mode (see the timing in Section 20)
1 = multiframe mode (see the timing in Section 20)
TSIO
TCR2.2
TSYNC I/O Select.
0 = TSYNC is an input
1 = TSYNC is an output
TD4YM
TCR2.1
Transmit Side D4 Yellow Alarm Select.
0 = zeros in bit 2 of all channels
1 = a one in the S–bit position of frame 12
TB7ZS
TCR2.0
Transmit Side Bit 7 Zero Suppression Enable.
0 = no stuffing occurs
1 = Bit 7 force to a one in channels with all zeros
Table 6-1. OUTPUT PIN TEST MODES
TEST 1
TEST 0
AFFECT ON OUTPUT PINS
0
Operate normally
0
1
Force all of the selected framer’s output pins 3–state (excludes other
Framers I/O pins and parallel port pins)
1
0
Force all of the selected framer’s output pins low (excludes other
Framers I/O pins and parallel port pins)
11
Force all of the selected framer’s output pins high (excludes other framers
I/O pins and parallel port pins)
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