參數(shù)資料
型號: XRT83SL34IV
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封裝: 14 X 20 MM, 1.40 MM HEIGHT, TQFP-128
文件頁數(shù): 62/80頁
文件大小: 1154K
代理商: XRT83SL34IV
XRT83SL34
QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.0
62
CLOCK SELECT REGISTER
The input clock source is used to generate all the necessary clock references internally to the LIU. The
microprocessor timing is derived from a PLL output which is chosen by programming the Clock Select Bits and
the Master Clock Rate in register 0x41h. Therefore, if the clock selection bits or the MCLRATE bit are being
programmed, the frequency of the PLL output will be adjusted accordingly.
During this adjustment, it is
important to "Not" write to any other bit location within the same register while selecting the input/output clock
frequency. For best results, when bits D[6:3] are being changed, the other bits D[7] and D[2:0] as shown in
Figure 23. should retain their previous values.
FIGURE 23. REGISTER 0X81H SUB REGISTERS
Programming Examples:
Example 1: Changing bits D[6:3]
If bits D[6:3] are the only values within the register that will change in a WRITE process, the microprocessor
only needs to initiate ONE write operation.
Example 2: Changing bits D[7] and D[2:0]
If bits D[7] and D[2:0] are the only values within the register that will change in a WRITE process, the
microprocessor only needs to initiate ONE write operation.
Example 3: Changing bits within D[6:3] and the other bits
In this scenario, one must initiate TWO write operations such that bits D[6:3] and the other bits do not change
within ONE write cycle. It is recommended that bits D[6:0] and the other bits be treated as two independent
sub-registers. One can either change the clock selection bits and then change bits D[7] and D[2:0] on the
SECOND write, or vice-versa. No order or sequence is necessary.
D0
D1
D2
D3
D4
D5
D6
D7
Clock Selection Bits
ExLOS, ICT
E1arben
相關(guān)PDF資料
PDF描述
XRT83SL34 QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
XS2F-A422-90-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-A90-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-AB0-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
XS2F-A422-AC0-A 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET
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