DS2149 查看數據表（PDF） - Maxim Integrated

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DS2149

5V T1/J1 Line Interface Unit

Maxim Integrated 

DS2149

2. OPERATING MODES

The DS2149 has several pins with multiple functions and names according to the selected operating

mode. These operating modes are summarized in the tables below.

Table 2-A. Operating Modes

PIN

QRSS DISABLED

BIPOLAR

NRZ

QRSS ENABLED

BIPOLAR

NRZ

1

MCLK

2

TCLK

3

TPOS

TDATA

INSLER

4

TNEG

INSBPV

INSBPV

6

RNEG

BPV

RNEG

BPV

7

RPOS

RDATA

RPOS

RDATA

8

RCLK

13

TTIP

16

TRING

19

RTIP

20

RRING

Control pins are affected by serial port and hardware modes.

Table 2-B. Control Pins for Hardware and Software Modes

PIN

HARDWARE MODE

NRZ

QRSS

SERIAL PORT MODE

NRZ

QRSS

5

MODE1

MODE1

9

MODE0

MODE0

11

JASEL

N.C.

12

RCL

RCL/QPD

RCL

RCL/QPD

23

L0

INT

24

L1

SDI

25

L2

SDO

17

L3

N.C.

18

NLOOP

NLOOP

26

RLB

NLB

CS

27

LLB

ALB

SCLK

28

TAIS

QRSS

CLKE

5 of 32

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