mikroElektronika EasyAVR4, Руководство пользователя

Страница: 19 / 34

M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D 1 19 9
page
EasyAVR
USB
4
EasyAVR4 User ’ s Manual MikroElektronika
Development
tools
7-SEGMENT DISPLAYS
EasyAVR4 has four 7-segment displays in multiplex mode. Data lines are connected to
PORTA, while each display is enabled through the lower four bits of PORTB.
dp
R28
10K
Q1
e
d
c
dp
b
a
f
g
Q4 Q3 Q2
10K 10K 10K
R29 R30 R31
8
.
8
.
a
b
c
d
e
f
g
PB7
SCK
PB6
MISO
PB5 MOSI
PB4 MMC-CS
DIS3
DIS3 DIS2 DIS1 DIS0
PB3
DIS2
PB2
DIS1
PB1
DIS0 PB0
1 ON
8
7
6
5
4
3
2
SW3
R2 - R9
8
.
8
.
1 2 3 4 5
10 9 8 7 6
8
.
8
.
1 2 3 4 5
10 9 8 7 6
8
.
8
.
1 2 3 4 5
10 9 8 7 6
8
.
8
.
1 2 3 4 5
10 9 8 7 6
A
TMEGAxxxx
PB1
PB2
PB3
PB4
PD1
PD2
PB5
PB6
PB7
PD4
PD5
PD6
PC1
PC0
PD7
PC2
PC3
PC4
PC5
PC6
PC7
PA7
PA6
PA5
PA4
PA3
PA2
PA0
PA1
PD3
PB0
PD0
RST
VCC
GND
XT2
XT1
AREF
AGND
AVCC
VCC
OSCILLATOR
10K
Reset
100n
VCC
Figure 22.
7-segment displays
Figure 23.
7-segment displays schematic
8
.
8
.
8
.
8
.
7
S
E
G
7
S
E
G
R
E
A
D
Y
R
E
A
D
Y