ATmega169P datasheet(262/393 Pages) ATMEL

No. de pieza	ATmega169P

Descripción Electrónicos	8-bit Microcontroller with 16K Bytes In-System Programmable Flash

PDF	393 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ATMEL [ATMEL Corporation]

Página de inicio	http://www.atmel.com

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262 / 393 page

262

8018N–AVR–08/09

ATmega169P

When no alternate port function is present, the Input Data – ID – corresponds to the PINxn Reg-

ister value (but ID has no synchronizer), Output Data corresponds to the PORT Register, Output

Control corresponds to the Data Direction – DD Register, and the Pull-up Enable – PUExn – cor-

responds to logic expression PUD · DDxn · PORTxn.

Digital alternate port functions are connected outside the dotted box in Figure 25-4 to make the

scan chain read the actual pin value. For Analog function, there is a direct connection from the

external pin to the analog circuit, and a scan chain is inserted on the interface between the digi-

tal logic and the analog circuitry.

Figure 25-3. Boundary-scan Cell for Bi-directional Port Pin with Pull-up Function.

Vcc

EXTEST

To Next Cell

ShiftDR

Output Control (OC)

Pullup Enable (PUE)

Output Data (OD)

Input Data (ID)

From Last Cell

UpdateDR

ClockDR

FF2

LD2

FF1

LD1

LD0

FF0

ATmega169P Datasheet(PDF) 262 Page - ATMEL Corporation