S2070 AMCC (Applied Micro Circuits Corp), S2070 Datasheet - Page 2

• Manufacturer Part Number: S2070
• Description: Fibre Channel Transceiver
• Manufacturer: AMCC (Applied Micro Circuits Corp)

2
S2070 OVERVIEW
The S2070 transmitter and receiver provide serial-
ization and deserialization functions for block en-
coded data to implement a Gigabit Ethernet or Fibre
Channel interface. The S2070 functional block dia-
gram is depicted in Figure 2. The sequence of op-
erations is as follows:
Transmitter
1.10-bit parallel input
2. Parallel-to-serial conversion
3. Serial output
Receiver
1. Clock and data recoverery from serial input
2. Serial-to-parallel conversion
3. Frame detection
4. 10-bit parallel output
The 10-bit parallel data input to the S2070 should be
from a DC-balanced encoding scheme, such as the
8B/10B transmission code, in which information to be
transmitted is encoded 8 bits at a time into 10-bit trans-
mission characters
mapping of the parallel data to the 8B/10B codes.
Figure 2. Functional Block Diagram
S2070
–LCK_REF
EN_CDET
EWRAP
TX[0:9]
RATEN
RXN
TBC
RXP
1
. For reference, Table 1 shows the
Control
Logic
10
2:1
F0 = F1 x 10
Multiplier w/
lock detect
PLL Clock
(4 x 10)
FIFO
FIBRE CHANNEL/GIGABIT ETHERNET TRANSCEIVER
Recovery w/
lock detect
PLL Clock
10
Loop Back
Local loopback provides a capability for performing
off-line testing. This is useful for ensuring the
integrity of the serial channel before enabling the
transmission medium. It also allows for system
diagnostics.
1
Balanced (0,4) 8B/10B Transmission Code," IBM Research
Report RC 9391, May 1982.
Table 1. Data Mapping to 8B/10B
Alphabetic Representation
T
A.X. Widmer and P.A. Franaszek, "A Byte Oriented DC
A
p l
[ X
a h
D
: 0
e b
Register
] 9
8
c i t
Register
B
Shift
R
r o
Shift
1 /
p e
0
Comma
e r
R
Detect
B
Logic
e s
[ X
t n
: 0
i t a
n o
] 9
0
a
D
1
b
Q
S2070
2
c
3
d
10
June 14, 2000 / Revision F
D
a
4
e
a t
B
5
y
i
e t
TXP
TXN
RX[0:9]
COM_DET
RBC0
RBC1
6
f
7
g
8
h
9
j