DOC1925 datasheet(14/61 Pages) ETC1

14 / 61 page

Hardware Description

3-4

AVR STK500 User Guide

1925C–AVR–3/03

Figure 3-6. Pinout of PORTE Header

The special functions of this port are:

n PE0 - PE2:

n REF: Analog reference voltage. This pin is connected to the AREF pin on devices

having a separate analog reference pin.

n XT1: XTAL 1 pin. The internal main clock signal to all sockets. If the XTAL1 jumper is

disconnected, this pin can be used as external clock signal.

n XT2: XTAL 2 pin. If the XTAL1 jumper is disconnected, this pin can be used for

external crystal with the XT1 pin.

The headers for the LEDs and switches use the same pinout as the I/O port headers.

The pinout of the switch header is explained in Figure 3-7 and the pinout for the LED

header is explained in Figure 3-8. The square marking indicates pin 1.

Figure 3-7. Pinout of the Switch Header

Figure 3-8. Pinout of the LED Header

Table 3-1. PORTE Connection

ATmega161

AT90S4414/AT90S8515

PE0

PE0/ICP/INT2

ICP

PE1

PE1/ALE

ALE

PE2

PE2/OC1B

OC1B

PE1

RST

GND

XT2

VTG

PE0

PE2

REF

XT1

GND

1 2

PORTE/AUX

SW1

SW3

SW5

SW7

VTG

SW0

SW2

SW4

SW6

GND

1 2

SWITCHES

LED1

LED3

LED5

LED7

VTG

LED0

LED2

LED4

LED6

GND

1 2

LEDS

DOC1925 数据表(PDF) 14 Page - List of Unclassifed Manufacturers

DOC1925 数据表(HTML) 14 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

数据表下载