DS2149

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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

QRSS DISABLED

QRSS ENABLED

PIN

BIPOLAR

NRZ

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

HARDWARE MODE

SERIAL PORT MODE

PIN

NRZ

QRSS

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