参数资料
型号: DS1878T+T&R
厂商: Maxim Integrated Products
文件页数: 84/101页
文件大小: 0K
描述: IC CTLR SFP W/DGTL LDD RX 28TQFN
标准包装: 2,500
类型: SFP+ 控制器
输入类型: 模拟,数字
输出类型: 数字
接口: I²C,LDD,串行
电流 - 电源: 2.5mA
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 带卷 (TR)
DS1878
SFP+ Controller with Digital LDD Interface
______________________________________________________________________________________
83
Table 02h, Register C7h: TBLSELPON
FACTORY DEFAULT
00h
READ ACCESS
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS
PW2 or (PW1 and RWTBL246)
MEMORY TYPE
Nonvolatile (SEE)
C7h
27
26
25
24
23
22
21
20
BIT 7
BIT 0
Chooses the initial value for the table-select byte (Lower Memory, Register 7Fh) at power-on.
FACTORY DEFAULT
0000h
READ ACCESS
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS
(PW2 and BIAS EN = 0) or (PW1 and RWTBL246 and BIAS EN = 0)
MEMORY TYPE
Volatile
C8h
0
28
C9h
27
26
25
24
23
22
21
20
BIT 7
BIT 0
When BIAS EN (Table 02h, Register 80h) is written to 0, writes to these bytes control the BIAS register, which then
updates a Maxim laser driver SET_IBIAS register.
FACTORY DEFAULT
00h
READ ACCESS
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS
(PW2 and BIAS EN = 0) or (PW1 and RWTBL246 and BIAS EN = 0)
MEMORY TYPE
Volatile
CAh
RESERVED
MAN_CLK
BIT 7
BIT 0
When BIAS EN (Table 02h, Register 80h) is written to 0, MAN_CLK controls the updates of the MAN BIAS value to the
BIAS register. This new value is sent through the 3-wire interface. The values of MAN BIAS must be written with a
separate write command. Setting MAN_CLK to a 1 clocks the MAN BIAS value to the BIAS register, which then
updates a Maxim laser driver SET_IBIAS register.
1) Write the MAN BIAS value with a write command.
2) Set the MAN_CLK bit to a 1 with a separate write command.
3) Clear the MAN_CLK bit to a 0 with a separate write command.
Table 02h, Register C8h–C9h: MAN BIAS
Table 02h, Register CAh: MAN_CNTL
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