AK61584 データシートの表示（PDF） - Asahi Kasei Microdevices

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AK61584

Dual Low Power T1/E1 Line Interface

Asahi Kasei Microdevices 

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

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