LM98640QML-SP Datasheet, PDF(45/54 Page) Texas Instruments – Dual Channel, 14-Bit, 40 MSPS Analog Front End with LVDS Output

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LM98640QML-SP Datasheet, PDF (45/54 Pages) Texas Instruments – Dual Channel, 14-Bit, 40 MSPS Analog Front End with LVDS Output

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ADDRESS

(BINARY)

11 1001

11 1100

11 1101

11 1110

LM98640QML-SP

SNAS461D â MAY 2010 â REVISED SEPTEMBER 2015

Table 9. Register Definitions - Digital Configuration (continued)

TITLE

Test Pattern Value

Digital Configuration

BASELINE

(BINARY)

0000 0000

BIT(s)

DESCRIPTION

[7:0] Lower 6 bits of Test Pattern Value Register. Specifies the lower 6 bits

of the test code value during Fixed Pattern and LVDS test, initial value

during H Gradient & V Gradient pattern, and higher value in the Lattice

and Stripe Pattern.

[7:0] Serial Communication Configuration Register.

[7:1] Not Used.

[0] Micro-Wire Automatic Read Disable.

0 Read data is always sent out on SDO during the first 8 SCLK cycles.

The register is selected by the register address in the previous cycle.

(read or write)

Test & Scan Control

0000 0000

1 Automatic read is disabled.

To read from a register two cycles need to be initiated by the master,

first cycle should be a read with the correct register address and

second can be a dummy read or read from another address or a write

cycle, and the data is sent first 8 SCLK of the second cycle. After a

write command SDO remains in Tri-State during first 8 SCLK.

[7:0] Test & Scan Control Register

[7:6] Not Used.

[5] Test Pattern Voting Switch.

0 Enable. Circuit Redundancy Voting is active.

1 Disable. First redundancy block output is used.

[4] Micro-wire Voting Switch.

0 Enable. Circuit Redundancy Voting is active.

1 Disable. First Micro-wire block output is used.

[3] Not Used.

[2] Test Reset. Resets the test block when High, normal test block function

when Low. This bit is not self-clearing.

[1] Test Mode Enable.

0 Disable.

1 Enable. Needed to run Test Pattern functions.

Device ID

0100 1000

[0] Not Used.

[7:0] Device Revision ID. Engineering samples might be x01 or x47.

Product Folder Links: LM98640QML-SP

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