MB90F482 datasheet(41/120 Pages) FUJITSU

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MB90480/485 Series

8/10-bit A/D Converter

The A/D converter converts analog input voltage to digital values, and provides the following features.

• Conversion time : minimum 3.68

µs per channel

(92 machine cycles at 25 MHz machine clock, including sampling time)

• Sampling time : minimum 1.92

µs per channel

(48 machine cycles at 25 MHz machine clock)

• RC sequential comparison conversion method, with sample & hold circuit.

• 8-bit or 10-bit resolution

• Analog input selection of 8 channels

Single conversion mode : Conversion from one selected channel.

Scan conversion mode : Conversion from multiple consecutive channels, programmable selection of up to

8 channels.

Continuous conversion mode : Repeated conversion of specified channels.

Stop conversion mode : Conversion from one channel followed by a pause until the next activation allows to

synchronize with conversion start.

• At the end of A/D conversion, an A/D conversion completed interrupt request can be generated to the CPU.

The interrupt can be used activate the

µDMAC in order to transfer the results of A/D conversion to memory

for efficient continuous processing.

• The starting factor conversion may be selected from software, external trigger (falling edge) , or timer (rising

edge) .

(1) Register List

ADCS2, ADCS1 (Control status register)

ADCR2, ADCR1 (Data register)

ADCS1

Address : 000046H

←Initial value

←Bit attributes

ADCS2

Address : 000047H

←Initial value

←Bit attributes

ADCR1

Address : 000048H

←Initial value

←Bit attributes

ADCR2

Address : 000049H

←Initial value

←Bit attributes

R/W

MD0

R/W

MD1

ANS2

ANS1

ANS0

ANE2

ANE1

ANE0

R/W

INT

R/W

BUSY

INTE

PAUS

STS1

STS0

STRT

Reserved

ST1

S10

ST0

CT1

CT0

⎯

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