MB88141P Ver la hoja de datos (PDF) - Fujitsu

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MB88141P

D/A Converter for Digital Tuning (With Built-in OP Amp and I/O Expander)

Fujitsu 

MB88141

(4) Channel Selection (8 bit)

C7 C6 C5 C4 C3 C2 C1 C0

××××0000

××××0001

Channel select

All channels selected *1

AO1 selected

××××1100

AO12 selected

××××1101

Don’t care

××××1110

Don’t care

××××1111

All channels selected *2

×: Don’t care

*1: The 1 byte of data following the channel selection is set on all channels (all channels set to the same data value).

S Slave address (7 bits) 0 A

XXXX0000

A

D/A data (8 bits)

AP

*2: The 12 bytes of data following the channel selection are set on all channels (all channels set to separate data

values).

S Slave address 0 A XXXX1111 A AO1 data A • • •

AO12 data A P

: Sent from master device

: Sent from MB88141 (slave device)

S: “Start” condition P: “Stop” condition A: “Acknowledge” output

Note: Setting will repeat, continuing in order from ch1, until the start and stop conditions are acknowledged.

(5) D/A Data (8 bits)

D7 D6 D5 D4 D3 D2 D1 D0

00000000

00000001

00000010

Channel select

≅ VSS

≅ (VREF / 256) × 1 + VSS

≅ (VREF / 256) × 2 + VSS

11111110

11111111

Note: VREF = VDD − VSS

≅ (VREF / 256) × 254 + VSS

≅ (VREF / 256) × 255 + VSS

7

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