CDCUN1208LP

DIVIDE

IN2P

/1,/2,/4,/8

IN1P

INSEL

IN1N

IN2N

OE

MODE (PINS)

ERC

Medium

Fast

Slow

NC

/1

/4

/2

NC

AUTO

IN2

IN1

NC

~

~ ~

~

~

~

OTTP

LVCMOS

HCSL

LVDS

NC

LVCMOS

HCSL

LVDS

NC

ITTP

CDCUN1208LP

www.ti.com

SCAS928 – MAY 2012

FUNCTIONAL DESCRIPTION

DEVICE CONTROL USING CONFIGURATION PINS

Figure 28 illustrates and Table 2 lists the CDCUN1208LP device settings using the configuration pins. Some pins

sense three different states (HIGH, LOW, OPEN) according to Figure 28 and DIGITAL INPUT ELECTRICAL

CHARACTERISTICS – OE (SCL), INSEL, ITTP, OTTP, DIVIDE (SDA/MOSI), ERC(ADDR/CS), MODE. The

device samples the state of the pins at power up and configures the device accordingly. Certain pins including

INSEL and OE are sampled continuously; thus changes of state of INSEL or OE controls the device instantly.

Figure 28. CDCUN1208LP Pin Configuration Overview

Table 2. CDCUN1208LP Pin Configuration Summary

DEVICE CONFIGURATION

PIN NAME

PIN NUMBER

DEFINITION

DETAILS

DEVICE OUTPUTS

OTTP

19

Output Type Setting

See Table 3

ERC

31

Edge Rate Control

See Table 4

OE

32

Device Global Output Enable

See Table 5

DEVICE INPUTS

ITTP

8

Input Type Setting

See Table 6

DIVIDE

1

IN2 Input Divider Control

See Table 7

INSEL

2

Input Multiplexer Setting

See Table 8

Copyright © 2012, Texas Instruments Incorporated

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