MAX3799 Maxim Integrated Products, MAX3799 Datasheet - Page 24

• Manufacturer Part Number: MAX3799
• Description: SFP+ Multirate Limiting Amplifier And VCSEL Driver
• Manufacturer: Maxim Integrated Products

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1Gbps to 14Gbps, SFP+ Multirate Limiting
Amplifier and VCSEL Driver
Bit 3: TXDE_EN. Enables or disables the transmit output deemphasis circuitry.
Bit 2: SOFTRES. Resets all registers to their default values.
Bit 1: TX_POL. Controls the polarity of the transmit signal path.
Bit 0: TX_EN. Enables or disables the transmit circuitry.
Bit 7: FST[7]. When the V
supply voltage is above 2.55V, the POR resets all registers to their default values and the FAULT is cleared.
Bit 6: FST[6]. When the voltage at BMON is above V
Bit 3: FST[3]. When the common-mode voltage at V
Bit 2: FST[2]. When the voltage at V
Bit 1: FST[1]. When the BIAS voltage goes below 0.44V, a HARD FAULT is reported.
Bit 0: TX_FAULT. Copy of a FAULT signal in FST[7] to FST[1]. A POR resets FST[7:1] to 0.
Bit 3: IMODERR. When the modulation-incremented result is greater than IMODMAX, a SOFT FAULT is reported.
See the Programming Modulation Current section.
Bit #
Name
Default Value
Bit #
Name
Default Value
Bit #
Name
Default Value
24
0 = disabled
1 = enabled
0 = normal
1 = reset
0 = inverse
1 = normal
0 = disabled
1 = enabled
______________________________________________________________________________________
(STICKY)
FST[7]
7
X
7
X
X
7
X
X
(STICKY)
CCT
FST[6]
6
X
6
X
X
6
X
X
supply voltage is below 2.45V, the POR circuitry reports a FAULT. Once the V
TOUT
(STICKY)
+/- goes below 0.8V, a HARD FAULT is reported.
5
X
X
5
X
X
5
X
X
(STICKY)
TOUT
CC
X
X
X
X
X
X
4
4
4
- 0.55V, a SOFT FAULT is reported.
+/- goes below 1.5V, a SOFT FAULT is reported.
IMODERR
(STICKY)
(STICKY)
TXDE_EN
FST[3]
X
X
3
3
3
0
IBIASERR
SOFTRES
(STICKY)
(STICKY)
Transmitter Status Register 1 (TXSTAT1)
Transmitter Status Register 2 (TXSTAT2)
FST[2]
Transmitter Control Register (TXCTRL)
2
X
2
X
2
0
(STICKY)
(STICKY)
TX_POL
FST[1]
TXED
1
X
1
X
1
1
TX_FAULT
(STICKY)
(STICKY)
TX_EN
X
X
X
0
1
0
0
ADDRESS
ADDRESS
ADDRESS
H0x06
H0x07
H0x05
CCT