参数资料
型号: DS26504L+
厂商: Maxim Integrated Products
文件页数: 105/129页
文件大小: 0K
描述: IC T1/E1/J1 64KCC ELEMENT 64LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
功能: BITS 元件
接口: 64KCC,E1,T1
电路数: 1
电源电压: 3.14 V ~ 3.47 V
电流 - 电源: 150mA
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
包括: *
产品目录页面: 1430 (CN2011-ZH PDF)
DS26504 T1/E1/J1/64KCC BITS Element
77 of 129
12.2 Alternate Sa/Si Bit Access Based on Double-Frame
On the receive side, the RAF and RNAF registers will always report the data as it received in the Sa and
Si bit locations. The RAF and RNAF registers are updated on align frame boundaries. The setting of the
receive align frame bit in status register 4 (SR4.0) will indicate that the contents of the RAF and RNAF
have been updated. The host can use the SR4.0 bit to know when to read the RAF and RNAF registers.
The host has 250
μs to retrieve the data before it is lost.
On the transmit side, data is sampled from the TAF and TNAF registers with the setting of the transmit
align frame bit in status register 4 (SR4.3). The host can use the SR4.3 bit to know when to update the
TAF and TNAF registers. It has 250
μs to update the data or else the old data will be retransmitted. If the
TAF and TNAF registers are only being used to source the align frame and non-align frame-sync
patterns, then the host need only write once to these registers. Data for the Si bit can come from the Si
bits of the RAF and TNAF registers, the TsiAF and TSiNAF registers, or passed through from the TSER
pin.
Register Name:
RAF
Register Description:
Receive Align Frame Register
Register Address:
56h
Bit #
7
6
5
4
3
2
1
0
Name
Si
FAS6
FAS5
FAS4
FAS3
FAS2
FAS1
FAS0
Default
0
HW
Mode
X
Bit 0: Frame Alignment Signal Bit 0 (FAS0). In normal operation this bit will be = 1.
Bit 1: Frame Alignment Signal Bit 1 (FAS1). In normal operation this bit will be = 1.
Bit 2: Frame Alignment Signal Bit 2 (FAS2). In normal operation this bit will be = 0.
Bit 3: Frame Alignment Signal Bit 3 (FAS3). In normal operation this bit will be = 1.
Bit 4: Frame Alignment Signal Bit 4 (FAS4). In normal operation this bit will be = 1.
Bit 5: Frame Alignment Signal Bit 5 (FAS5). In normal operation this bit will be = 0.
Bit 6: Frame Alignment Signal Bit 6 (FAS6). In normal operation this bit will be = 0.
Bit 7: International Bit (Si)
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