X9530 datasheet(7/30 Pages) XICOR

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X9530

Characteristics subject to change without notice.

7 of 30

REV 3.7 8/26/04

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I2FSO1–I2FSO0: CURRENT GENERATOR 2 FULL SCALE OUT-

PUT

CURRENT SET BITS (NON-VOLATILE)

These two bits are used to set the full scale output

current at the Current Generator 2 pin, I2. If both bits

are set to “0” (default), an external resistor connected

between pin R2 and Vss, determines the full scale

output current available at pin I2. The other three

options are indicated in the table below. The direction

of this current is set by bit I2DS in Control Register 0.

*No external resistor should be connected in these cases between

R2 and VSS.

L1DAS: LUT1 DIRECT ACCESS SELECT BIT (NON-VOLATILE)

When bit L1DAS is set to “0” (default), LUT1 is

addressed by the output of the on-chip A/D converter.

When bit L1DAS is set to “1”, LUT1 is addressed by

bits L1DA5– L1DA0.

D1DAS: D/A 1 DIRECT ACCESS SELECT BIT (NON-VOLATILE)

When bit D1DAS is set to “0” (default), the input to the

D/A converter 1 is a row of LUT1. When bit D1DAS is

set to “1”, that input is the content of the Control

L2DAS: LUT2 DIRECT ACCESS SELECT BIT (NON-VOLATILE)

When bit L2DAS is set to “0” (default), LUT2 is

addressed by the output of the on-chip A/D converter.

When bit L2DAS is set to “1”, LUT2 is addressed by

bits L2DA5–L2DA0.

D2DAS: D/A 2 DIRECT ACCESS SELECT BIT (NONVOLATILE)

When bit D2DAS is set to “0” (default), the input to the

D/A converter 2 is a row of LUT2. When bit D2DAS is

set to “1”, that input is the content of the Control

Control Register 6

This register is accessed by performing a Read or

Write operation to address 86h of memory.

WEL: WRITE ENABLE LATCH (VOLATILE)

The WEL bit controls the Write Enable status of the

entire X9530 device. This bit must be set to “1” before

any other Write operation (volatile or nonvolatile).

Otherwise, any proceeding Write operation to memory

is aborted and no ACK is issued after a Data Byte.

The WEL bit is a volatile latch that powers up in the “0”

state (disabled). The WEL bit is enabled by writing

100000002 to Control register 6. Once enabled, the

WEL bit remains set to “1” until the X9530 is powered

down, and then up again, or until it is reset to “0” by

writing 000000002 to Control register 6.

A Write operation that modifies the value of the WEL

bit will not cause a change in other bits of Control

Status Register – ADC Output

This register is accessed by performing a Read

operation to address 87h of memory.

AD5–AD0: A/D CONVERTER OUTPUT BITS (READ ONLY)

These six bits are the binary output of the on-chip A/D

converter. The output is 0000002 for minimum input

and 1111112 for full scale input.

I2FSO1

I2FSO0

I2 Full Scale Output Current

Set externally via pin R2 (Default)

±0.4mA*

±0.85 mA*

±1.3 mA*

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