Datasheet
TLK2711A
SLLS908B –JULY 2008–REVISED OCTOBER 2012
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TERMINAL FUNCTIONS (Continued)
TERMINAL
NO. I/O DESCRIPTION
NAME
GQE RCP
RXD0 H3 51 O Receive data bus. These outputs carry 16-bit parallel data output from the transceiver to the
protocol device, synchronized to RXCLK. The data is valid on the rising edge of RXCLK as shown
RXD1 J2 50
in Figure 5. These terminals are in high-impedance state during power-on reset.
RXD2 H2 49
RXD3 H1 47
RXD4 G2 46
RXD5 G1 45
RXD6 F2 44
RXD7 F1 42
RXD8 E1 40
RXD9 D1 39
RXD10 C1 37
RXD11 D2 36
RXD12 C2 35
RXD13 B1 34
RXD14 B2 32
RXD15 A2 31
RXN J3
RXP J4
Serial receive inputs. RXP and RXN together are the differential serial input interface from a copper
I
or an optical I/F module.
DINRXN 53
DINRXP 54
TESTEN B4 27 I
(1)
Test mode enable. This terminal should be left unconnected or tied low.
TKLSB A6 22 I
(2)
K-code generator (LSB). When TKLSB is high, an 8-bit/10-bit K code is transmitted as controlled by
data bits TXD0–TXD7. When TKLSB is low an 8-bit/10-bit D code is transmitted as controlled by
data bits TXD0–TXD7.
TKMSB B7 20 I
(1)
K-code generator (MSB). When TKMSB is high an 8-bit/10-bit K code is transmitted as controlled by
data bits TXD8–TXD15. When TKMSB is low an 8-bit/10-bit D code is transmitted as controlled by
data bits TXD8–TXD15.
TXCLK E9 Reference clock. TXCLK is a continuous external input clock that synchronizes the transmitter
interface signals TKMSB, TKLSB and TXD [0..15]. The frequency range of TXCLK is 80 MHz to 135
GTX_CLK 8
I
MHz. The transmitter uses the rising edge of this clock to register the 16-bit input data TXD [0..15]
for serialization.
TXD0 H7 62 I Transmit data bus. These inputs carry the 16-bit parallel data output from a protocol device to the
transceiver for encoding, serialization, and transmission. This 16-bit parallel data clocked into the
TXD1 J8 63
transceiver on the rising edge of TXCLK as shown in Figure 2.
TXD2 H8 64
TXD3 H9 2
TXD4 G8 3
TXD5 G9 4
TXD6 F9 6
TXD7 F8 7
TXD8 D9 10
TXD9 D8 11
TXD10 C9 12
TXD11 C8 14
TXD12 B9 15
TXD13 B8 16
TXD14 A8 17
TXD15 A7 19
TXN J6 Serial transmit outputs. TXP and TXN are differential serial outputs that interface to copper or an
optical I/F module. These terminals transmit NRZ data at a rate of 20 times the TXCLK value. TXP
TXP J7
O
and TXN are put in a high-impedance state when LOOPEN is high and are active when LOOPEN is
DOUTTXN 59
low. During power-on reset these terminals are high impedance.
DOUTTXP 60
(1) Internal 10k pulldown
(2) Internal 10k pullup
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