参数资料
型号: DS21Q44T+
厂商: Maxim Integrated Products
文件页数: 44/105页
文件大小: 0K
描述: IC FRAMER ENHANCED E1 4X 128TQFP
标准包装: 72
控制器类型: E1 调帧器
接口: 并行/串行
电源电压: 2.97 V ~ 3.63 V
电流 - 电源: 75mA
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 128-LQFP
供应商设备封装: 128-LQFP(14x20)
包装: 管件
DS21Q44
43 of 105
EBCR1: E-BIT COUNT REGISTER 1 (Address=04 Hex)
EBCR2: E-BIT COUNT REGISTER 2 (Address=05 Hex)
(MSB)
(LSB)
(note 1)
EB9
EB8
EBCR1
EB7
EB6
EB5
EB4
EB3
EB2
EB1
EB0
EBCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
EB9
EBCR1.1
MSB of the 10–Bit E–Bit Error Count
EB0
EBCR2.0
LSB of the 10–Bit E–Bit Error Count
NOTES:
1) The upper 6 bits of EBCR1 at address 04 are the least significant bits of the 12–bit FAS error counter.
FAS Error Counter
FAS Count Register 1 (FASCR1) is the most significant word and FASCR2 is the least significant word
of a 12–bit counter that records word errors in the Frame Alignment Signal in timeslot 0. This counter is
disabled when RLOS is high. FAS errors will not be counted when the framer is searching for FAS
alignment and/or synchronization at either the CAS or CRC4 multiframe level. Since the maximum FAS
word error count in a one second period is 4000, this counter cannot saturate.
FASCR1: FAS ERROR COUNT REGISTER 1 (Address=02 Hex)
FASCR2: FAS ERROR COUNT REGISTER 2 (Address=04 Hex)
(MSB)
(LSB)
FAS11
FAS10
FAS9
FAS8
FAS7
FAS6
(note 2)
FASCR1
FAS5
FAS4
FAS3
FAS2
FAS1
FAS0
(note 1)
FASCR2
SYMBOL
POSITION
NAME AND DESCRIPTION
FAS11
FASCR1.7
MSB of the 12–Bit FAS Error Count
FAS0
FASCR2.2
LSB of the 12–Bit FAS Error Count
NOTES:
1) The lower 2 bits of FASCR1 at address 02 are the most significant bits of the 10-bit CRC4 error
counter.
2) The lower 2 bits of FASCR2 at address 04 are the most significant bits of the 10-bit E-Bit counter.
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