MIKROE-977 mikroElektronika, MIKROE-977 Datasheet - Page 9

• Manufacturer Part Number: MIKROE-977
• Description: Development Boards & Kits - AVR READY FOR AVR BOARD
• Manufacturer: mikroElektronika

Specifications of MIKROE-977

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: ATmega16
• Core: AVR
• Interface Type: UART, USB
• Operating Supply Voltage: 9 V to 32 V

Board contains 8MHz external crystal oscillator
which delivers the clock necessary for the
operation of microcontroller. Raw clock signal from
the crystal is sinusoidal, so additional 74HC04 is
provided which filters it to create square signal
necessary for stable operation.
OSC
6
DATA BUS
2
4
8
12
74HC04
74HC04
74HC04
74HC04
74HC04
U3A
U3B
U3D
U3F
U3C
5
13
1
3
9
VCC
Figure 6-1:
External Oscillator schematics
C1
100nF
R13
1K
10
C4
22pF
74HC04
U3E
X1
R12
1M
8 MHz
11
C3
22pF
C2
100nF
VCC
PB0
PB1
PB2
PB3
PB4
PB5-MOSI
PB6-MISO
PB7-SCK
mRST#
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
OSC
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
U1
DIP40A
Page 9
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VCC
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PE0
PE1
PE2
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
VCC
C10
100nF
PB0
PB1
PB2
PB3
PB4
PB5-MOSI
PB6-MISO
PB7-SCK
mRST#
OSC
PD0
PD1
PD2
PD3
PD4
PD5
PD6
VCC
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
U2
DIP40B
External clock module
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Figure 6-2:
AVCC
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
AREF
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PD7
VCC
FP2
FERRITE
C13
100nF
AVCC
C11
100nF