參數資料
型號： DS1878T+T
廠商： Maxim Integrated Products
文件頁數： 23/101頁
文件大?。?/td> 0K
描述： IC CTLR SFP W/DGTL LDD RX 28TQFN
產品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 2,500
類型： SFP+ 控制器
輸入類型： 模擬，數字
輸出類型： 數字
接口： I²C，LDD，串行
電流 - 電源： 2.5mA
安裝類型： 表面貼裝
封裝/外殼： 28-WFQFN 裸露焊盤
供應商設備封裝： 28-TQFN-EP（5x5）
包裝： 帶卷 (TR)
DS1878
SFP+ Controller with Digital LDD Interface
28
______________________________________________________________________________________
The control registers are first written once VCC exceeds
POA. They are also written after every temperature con-
version and on a rising edge of TXD. Any time one of
these events occurs, the device reads and updates
TXSTAT1 and TXSTAT2, and writes SET_IBIAS and
SET_IMOD to 0.
Slave Register Map and DS1878 Corresponding Location
SLAVE REGISTER
AND ADDRESS
DS1878
REGISTER
ACTIVE CHIP
SELECTS
REGISTER FUNCTION
DS1878 LOCATION
00h, RXCTRL1
RXCTRL1
1 and 2
Receiver Control
Table 02h, E8h
01h, RXCTRL2
RXCTRL2
1 and 2
Receiver Control
Table 02h, E9h
02h, RXSTAT
STATUS
1 and 2
Receiver Status
Lower Memory, 6Eh, Bit 1 comes from
the LOSOUT pin (Note 1)
03h, SET_CML
SETCML
1 and 2
Output CML Level
Setting
Table 02h, EAh
04h, SET_LOS
SETLOSH,
SETLOSL
1 and 2
LOS Assert Level
Settings
Table 02h, EBh is SETLOSH,
Table 02h, F3h is SETLOSL (Note 2)
05h, TXCTRL
TXCTRL
1 Only (Note 3)
Transmitter Control
Table 02h, ECh
06h, TXSTAT1
TXSTAT1
1 Only (Note 3)
Transmitter Status
Table 02h, FCh
07h, TXSTAT2
TXSTAT2
1 Only (Note 3)
Transmitter Status
Table 02h, FDh
08h, SET_IBIAS
BIAS
1 Only (Note 3)
BIAS Current Setting
Table 02h, CBh–CCh
09h, SET_IMOD
MODULATION
1 Only (Note 3)
MODULATION Current
Setting
Table 02h, 82h–83h
0Ah, SET_IMODMAX
IMODMAX
1 Only (Note 3)
MODULATION Current
Limit Setting
Table 02h, EDh
0Bh, SET_IBIASMAX
IBIASMAX
1 Only (Note 3)
BIAS Current Limit
Setting
Table 02h, EEh
0Ch, MODINC
MODINC
1 Only (Note 3)
MODULATION Current
DAC Increment Setting
Automatically written after each
temperature conversion.
0Dh, BIASINC
BIASINC
1 Only (Note 3)
BIAS Current DAC
Increment Setting
Automatically performed by APC loop.
Disable APC before using 3-wire
manual mode.
0Eh, MODECTRL
MODECTRL
1 and 2
General Control
(Note 1)
0Fh, SET_PWCTRL
SETPWCTRL
1 Only (Note 3)
Tx Pulse Width Setting
Table 02h, EFh
10h, SET_TXDE
SETTXDE
1 Only (Note 3)
Tx Deemphasis Setting Table 02h, F0h
11h, SET_TXEQ
SETTXEQ
1 Only (Note 3)
Tx Equalization
Table 02h, F1h
12h, SET_LOSTIMER
SETLOSTIMER
1 and 2
LOS Timer
Table 02h, F2h
14h, TXTM
TXTM
1 and 2
Tx Test Mode
(Note 1)
15h, RXTM1
RXTM1
1 and 2
Rx Test Mode
(Note 1)
16h, RXTM2
RXTM2
1 and 2
Rx Test Mode
(Note 1)
17h, Reserved
RXCTRL3
1 and 2
Receiver Control
Table 02h, F4h
18h, Reserved
TXCTRL2
1 Only (Note 3)
Transmitter Control
Table 02h, F5h
19h, Reserved
TXCTRL3
1 Only (Note 3)
Transmitter Control
Table 02h, F6h
Note 1: This register is not present in the DS1878. To access this register the user must use manual operation (see the Manual
Operation
section for details).
Note 2: Either SETLOSH or SETLOSL is written to the slave register SET_LOS. This is determined by the signal RSEL (see Figure 16).
Note 3: In manual 3-wire mode both chip selects are active for all registers.
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