AK61584 Datasheet, PDF (21/38 Pages) Asahi Kasei Microsystems – Dual Low Power T1/E1 Line Interface

ASAHI KASEI
[AK61584]
Register
Address
h14
b0100
h15
b0101
bit Name
Definition
1
0
Channel 1 Control A
7 CLKE
RPOS/RNEG valid on
RPOS/RNEG valid on rising
Falling RCLK
RCLK
6 PD1
Power Down Channel 1
Power Up Channel 1
5 ATTEN01
ATTEN01 ATTENN11
4 ATTEN11
0
0
Attenuator 1 in receiver path
0
1
Attenuator 1 in transmit path
1
0
Attenuator 1 inactive
3 CODER1
Coder/Mode enabled
Transparent mode enabled
2 AMI-T1
AMI encoder enabled
B8ZS/HDB3 encoder enabled
1 AMI-R1
AMI decoder enabled
B8ZS/HDB3 decoder enabled
0 Factory Test 1 Test
Normal Operation
Channel 2 Control A
7 Reserved
6 PD2
5 ATTEN02
4 ATTEN12
3 CODER2
2 AMI-T2
1 AMI-R2
0 Factory Test
Must be set to 0
Power Down Channel 2
ATTEN02 ATTEN12
0
0
0
1
1
0
Coder/Mode enabled
AMI encoder enabled
AMI decoder enabled
Test
Power Up Channel 2
Attenuator 2 in receiver path
Attenuator 2 in transmit path
Attenuator 2 inactive
Transparent mode enabled
B8ZS/HDB3 encoder enabled
B8ZS/HDB3 decoder enabled
Normal Operation
Table 5(c). Control A Registers
Reset
Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
CODER: Writing a “1” enables a coder (AMI,
B8ZS or HDB3), and enables pins TDATA, RDATA,
AIS and BPV. Writing a “0” disables the coder, plac-
ing the channel in transparent mode, and enables pins TPOS,
TNEG, RPOS and RNEG.
channels operating at different rates. After a manual or
power-on reset, the CON bits are reset to the E1 rate.
If a single channel T1 mode is desired (i.e., second
channel is not used), it is recommended that both chan-
nels be set to the T1 rate.
Factory Test: Must be set to “0” for normal operation.
PD: Writing a “1” powers down the channel.
LLOOP1: Writing a “1” enables local loopback #1,
as shown in the block diagram on the front page of the
data sheet.
Control B Registers Description
Each bit in the control register is defined below.
LLOOP2: Writing a “1” enables local loopback #2,
as shown in the block diagram on the front page of the
data sheet.
CON<0:2>: controls the configuration of the trans-
mitter, receiver and coder as shown in Table 1. Both
channels must operate at the same rate (both T1 or
both E1). Specifications are not guaranteed with the
RLOOP: Writing a “1” enables remote loopback
for this channel.
TAOS: Writing a “1” enables transmit all ones.
0185-E-00
-21-
‘98/04