Le58083
The format in the upstream direction is the same except that the command byte is omitted.
Details of COP, CSD Data Commands
Data Sheet
This section describes in detail each of the monitor channel COP commands. Each of the commands is shown along with the
format of any additional data bytes that follow. For details of the filter coefficients of the form CXYmXY, please refer to the
Description of Coefficients section on page 86.
COP 1. Write/Read AISN Coefficients and Analog Gains
GCI Command
(50/51h)
R/W = 0: Write
R/W = 1: Read
D7
D6
D5
D4
D3
D2
D1
D0
Command
I/O Data
0
1
0
1
0
0
0
W/R
DGIN
AX
AR
AISN4
ASIN3
AISN2
AISN1
AISN0
Disable Input Attenuator (GIN)
DGIN = 0*
Input attenuator on
Input attenuator off
DGIN = 1
Transmit analog gain
AX = 0*:
0 dB gain
6.02 dB gain
AX = 1:
Receive Analog Loss
AR = 0*:
0 dB loss
6.02 dB loss
AR = 1:
AISN coefficient
AISN = 0*–31 See below (Default value = 0)
The Analog Impedance Scaling Network (AISN) gain can be varied from −0.9375 • GIN to +0.9375 • GIN in
multiples of 0.0625 • GIN. The gain coefficient is decoded using the following equation:
hAISN = 0.0625 • GIN [(16 • AISN4 + 8 • AISN3 + 4 • AISN2 + 2 • AISN1 + AISN0) – 16]
where hAISN is the gain of the AISN. A value of AISN = 10000 turns on the Full Digital Loopback mode.
* Power Up and Hardware Reset (RST) Value = 00h
COP 2. Write/Read GX Filter Coefficients
GCI Command
(80/81h)
R/W = 0: Write
R/W = 1: Read
D7
D6
0
D5
D4
0
D3
D2
0
D1
D0
Command
1
0
0
0
W/R
Coefficient Byte 1
Coefficient Byte 2
C40
C20
m40
m20
C30
C10
m30
m10
Cxy = 0 or 1 in the command above corresponds to Cxy = +1 or −1, respectively, in the equation below.
80
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
