QT2032-EKG-1A2 Applied Micro Circuits Corporation, QT2032-EKG-1A2 Datasheet - Page 59

• Manufacturer Part Number: QT2032-EKG-1A2
• Manufacturer: Applied Micro Circuits Corporation

Specifications of QT2032-EKG-1A2

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 20: LEGACY Pin Changes to Chip Functions
8.2.14 Receive Equalizer Enable Control Pin (EQ_EN)
The EQ_EN pin is used to enable the fiber receive equalizer. When the pin is high, the equalizer is enabled. When
it is low, the equalizer state depends on the state of the XFP pin and the ‘override_xfp_eqn’ bit.
The control logic for the receive equalizer is shown in Table 21.
Table 21: Receive Equalizer Truth Table
8.3 Control (Input) Pins (QT2032 only)
The pins described in this section apply to the QT2032 only. These pins are unused for the QT2022 product.
Please see Table 3 for required connectivity information.
8.3.1 LAN Mode Control Pin (LANMODE)
The LANMODE Control Pin is used to force the QT2032 into LAN mode. This pin is used in conjunction with the
MDIO “Port Type Selection” bit (address 2.7.0). When LANMODE is low, the mode is determined by the “Port Type
Selection” bit. When LANMODE is high, the mode is forced to LAN mode regardless of the state of the WIS Select
bit. The logic is summarized in Table 5.
When the LANMODE pin is high, access to the WIS register space (device 2) is disabled. MDIO writes to this
space will have no effect and MDIO reads to this space will return all 0’s.
The LANMODE pin is not defined for the QT2022.
Table 22: Application Mode Based on LANMODE Control Pin and WIS Select Bit
Revision 5.11
1
0
0
1
Item
EQ_EN Pin State
LANMODE Control Pin
Tx Jitter Test Pattern
Enabled by setting Register
3.2A=000Eh
0
0
0
0
1
Function
AppliedMicro - Confidential & Proprietary
XFP Pin State
0
1
x
0
0
1
1
x
Output pattern is a square wave with 8
ones and 8 zeros (00FFh)
“Port Type Selection” bit
MDIO 2.7.0
LEGACY = 1
Definition
‘override_xfp_eqn’
bit 1.C030h.6
0
1
0
1
x
LAN
WAN
LAN
Output pattern is a square wave with 4
ones and 4 zeros (0F0Fh)
QT2022/32 - Data Sheet: DS3051
1 = enabled; 0 = disabled
Equalizer State
LEGACY = 0
Definition
Mode
0
1
1
0
1
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