ATMEGA64L-8MI 查看數據表（PDF） - Atmel Corporation

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ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

Scanning the Analog

Comparator

ATmega64(L)

in sleep modes, thereby disconnecting the Oscillator pins from the scan path if not

provided. The INTCAP Fuses are not supported in the scan-chain, so the boundary

scan chain cannot make a XTAL Oscillator requiring internal capacitors to run unless

the fuse is correctly programmed.

The relevant Comparator signals regarding Boundary-scan are shown in Figure 132.

The Boundary-scan cell from Figure 133 is attached to each of these signals. The sig-

nals are described in Table 104.

The Comparator needs not be used for pure connectivity testing, since all analog inputs

are shared with a digital port pin as well.

Figure 132. Analog Comparator

BANDGAP

REFERENCE

ACBG

ACME

ADCEN

ADC MULTIPLEXER

OUTPUT

AC_IDLE

ACO

2490G–AVR–03/04

263

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