参数资料
型号: DS2154L
厂商: Maxim Integrated Products
文件页数: 14/87页
文件大小: 0K
描述: IC TXRX E1 1CHIP 5V ENH 100-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
产品变化通告: Product Discontinuation 20/Feb/2012
标准包装: 90
类型: 收发器
驱动器/接收器数: 1/1
规程: E1
电源电压: 4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 100-LQFP
供应商设备封装: 100-LQFP(14x14)
包装: 管件
产品目录页面: 1429 (CN2011-ZH PDF)
DS2154
21 of 87
RCR1: RECEIVE CONTROL REGISTER 1 (Address = 10 Hex)
(MSB)
(LSB)
RSMF
RSM
RSIO
FRC
SYNCE
RESYNC
SYMBOL
POSITION
NAME AND DESCRIPTION
RSMF
RCR1.7
RSYNC Multiframe Function. Only used if the RSYNC pin is
programmed in the multiframe mode (RCR1.6 = 1).
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC4 multiframe boundaries
RSM
RCR1.6
RSYNC Mode Select.
0 = frame mode (see the timing in Section 14)
1 = multiframe mode (see the timing in Section 14)
RSIO
RCR1.5
RSYNC I/O Select. (Note: This bit must be set to 0 when
RCR2.1 = 0.)
0 = RSYNC is an output (depends on RCR1.6)
1 = RSYNC is an input (only valid if elastic store enabled)
RCR1.4,
RCR1.3
Not Assigned. Should be set to 0 when written.
FRC
RCR1.2
Frame Resync Criteria.
0 = resync if FAS received in error three consecutive times
1 =resync if FAS or bit 2 of non-FAS is received in error three
consecutive times
SYNCE
RCR1.1
Sync Enable.
0 = auto resync enabled
1 = auto resync disabled
RESYNC
RCR1.0
Resync. When toggled from low to high, a resync is initiated.
Must be cleared and set again for a subsequent resync.
Table 4-1. Sync/Resync Criteria
FRAME OR
MULTIFRAME
LEVEL
SYNC CRITERIA
RESYNC CRITERIA
ITU SPEC.
FAS
FAS present in frame N and N + 2, and
FAS not present in frame N + 1
Three consecutive incorrect
FAS received
Alternate (RCR1.2 = 1) the
above criteria is met or three
consecutive incorrect bit 2 of
non-FAS received
G.706
4.1.1
4.1.2
CRC4
Two valid MF alignment words found
within 8ms
915 or more CRC4 code
words out of 1000 received in
error
G.706
4.2 and 4.3.2
CAS
Valid MF alignment word found and
previous time slot 16 contains code
other than all 0s
Two consecutive MF
alignment words received in
error
G.732
5.2
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