ISD-ES521 Nuvoton Technology Corporation of America, ISD-ES521 Datasheet - Page 13

• Manufacturer Part Number: ISD-ES521
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of ISD-ES521

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ES521 Schematics
Connectors and clock generation
CONNECTOR DB25
P1
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
RAC_1
RAC_2
RB3
RB2
RB1
RB0
TP1
AGND
1
VCCD
TP2
DGND
1
R9
470
RB0
RB1
RB2
RB3
C12
0.1uf
TP3
AGND
12
1
1
2
3
4
5
6
7
8
9
14
7
RA2
RA3
RA4
MCLR
VSS
RB0
RB1
RB2
RB3
U7
5
PIC16F84A-20P
TP4
DGND
1
14
7
U3D
13
U3B
4
SN74LV125AD
OSC1
OSC2
VDD
11
RA1
RA0
RB7
RB6
RB5
RB4
TP5
AGND
1
SN74LV125AD
6
VCCD
18
17
16
15
14
13
12
11
10
R8
1K
TP6
DGND
VCCD
1
R7
1K
TP7
AGND
SDA_1
WS_1
1
SCK_1
MCLK_1
C22
0.01uf
SCL_1
TP8
DGND
1
9
14
7
VCCD
2
14
7
10
U3C
C23
0.1uf
1
SN74LV125AD
U3A
SN74LV125AD
8
3
PJ_202A_POWER_JACK
DC POWER JACK w SW
J7
+9VDC
J8
HEADER 2
1
4
1
4
9V
Cell
B500CT3E 20.480
MHZ
B500CT3E 13.824
MHZ
1 NC
VSS
1 NC
VSS
U5
U6
1
3
2
USE FREE
TRACK
TO SHORT(.156)
1
2
9V BATT HOLDER
13
1
3
2
J6
Single point
connection
close to J1
+
-
1
2
100uf @ 20V
VCC
VCC
OUT
OUT
SPDT SWITCH
1
2
1
5
8
5
8
SW2
C14
1
2
2
R16
3.6K
D1
LED
3
+
3
C18
0.01uf
C20
0.01uf
1
1
C15
1uf
VSS (GND)
VSS (GND)
C19
0.1uf
C21
0.1uf
VCCD
VCCD
U2
U4
NJU7201L30
+
NJU7201L30
+
1uf
J9
HEADER 3
C17
2
2
IN
IN
1
2
3
3V OUT
3V OUT
3
3
VCCD
VCCA
MCLK_1
C13
0.1uf
C16
0.1uf
Preliminary