Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 241)

241

ATmega169V/L

2514A–AVR–08/02

Table 105. Boundary-scan Signals for the ADC

(1)

Signal

Name

Direction

as Seen

from the

ADC Description

Recommen-

ded Input

when not

in Use

Output Values when

Recommended Inputs

are Used, and CPU is

not Using the ADC

COMP Output Comparator Output 0 0

ACLK Input Clock signal to gain

stages implemented

as Switch-cap filters

ACTEN Input Enable path from gain

stages to the

comparator

ADHSM Input Increases speed of

comparator at the

sacrifice of higher

power consumption

ADCBGEN Input Enable Band-gap

reference as negative

input to comparator

ADCEN Input Power-on signal to the

ADC

AMPEN Input Power-on signal to the

gain stages

DAC_9 Input Bit 9 of digital value to

DAC

DAC_8 Input Bit 8 of digital value to

DAC

DAC_7 Input Bit 7 of digital value to

DAC

DAC_6 Input Bit 6 of digital value to

DAC

DAC_5 Input Bit 5 of digital value to

DAC

DAC_4 Input Bit 4 of digital value to

DAC

DAC_3 Input Bit 3 of digital value to

DAC

DAC_2 Input Bit 2 of digital value to

DAC

DAC_1 Input Bit 1 of digital value to

DAC

DAC_0 Input Bit 0 of digital value to

DAC

EXTCH Input Connect ADC

channels 0 - 3 to by-

pass path around gain

stages

1 2 ... 236 237 238 239 240 241 242 243 244 245 246 ... 316 317

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Rainbow-electronics Atmega169L Manuel d'utilisateur Page 241

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