Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsData collecting ICsData acquisition IC - DA converter (DAC) TQFN 64

DAC8218

SBAS460A –MAY 2009–REVISED DECEMBER 2009

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Monitor Register (default = 0000h).

The Monitor Register selects one of the DAC outputs, auxiliary analog inputs, reference buffer outputs, or offset

DAC outputs to be monitored through the V

MON

pin. When bits [D15:D4] = '0', the monitor is disabled and V

MON

in a Hi-Z state.

Note that if any value is written other than those specified in Table 12, the Monitor Register stores the invalid

value; however, the V

MON

pin is forced into a Hi-Z state.

Table 12. Monitor Register (Default = 0000h)

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3:D0 V

MON

CONNECTS TO

0 0 0 0 0 0 0 0 0 0 0 1 X

(1)

Reference buffer B output

0 0 0 0 0 0 0 0 0 0 1 0 X Reference buffer A output

0 0 0 0 0 0 0 0 0 1 0 1 X Offset DAC B output

0 0 0 0 0 0 0 0 0 1 1 0 X Offset DAC A output

0 0 0 0 0 0 0 0 0 1 0 0 X AIN-0

0 0 0 0 0 0 0 0 1 0 0 0 X AIN-1

0 0 0 0 0 0 0 1 0 0 0 0 X DAC-0

0 0 0 0 0 0 1 0 0 0 0 0 X DAC-1

0 0 0 0 0 1 0 0 0 0 0 0 X DAC-2

0 0 0 0 1 0 0 0 0 0 0 0 X DAC-4

0 0 0 1 0 0 0 0 0 0 0 0 X DAC-4

0 0 1 0 0 0 0 0 0 0 0 0 X DAC-5

0 1 0 0 0 0 0 0 0 0 0 0 X DAC-6

1 0 0 0 0 0 0 0 0 0 0 0 X DAC-7

0 0 0 0 0 0 0 0 0 0 0 0 X Monitor function disabled, Hi-Z (default)

(1) X = don't care.

BLANKSPACE

GPIO Register (default = 3800h).

The GPIO Register determines the status of each GPIO pin.

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

GPIO-2 GPIO-1 GPIO-0 X X X X X X X X X X X X X

GPIO-2:0 For write operations, the GPIO-n pin operates as an output. Writing a '1' to the GPIO-n bit sets the

GPIO-n pin to high impedance, and writing a '0' sets the GPIO-n pin to logic low. An external

pull-up resistor is required when using the GPIO-n pin as an output.

For read operations, the GPIO-n pin operates as an input. Read the GPIO-n bit to receive the

status of the corresponding GPIO-n pin. Reading a '0' indicates that the GPIO-n pin is low, and

reading a '1' indicates that the GPIO-n pin is high.

After power-on reset, or any forced hardware or software reset, all GPIO-n bits are set to '1', and

the GPIO pins are in a high impedance state.

Product Folder Link(s): DAC8218