DSECASH Maxim Integrated Products, DSECASH Datasheet - Page 13

• Manufacturer Part Number: DSECASH
• Description: Power Management Modules & Development Tools eCash Evaluation Kit eCash Evaluation Kit
• Manufacturer: Maxim Integrated Products

Specifications of DSECASH

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SCHEMATICS
See below for some the board schematics. Schematics covered are: Processor LCD and Piezo, Coprocessor and
1-Wire Customer, Power Supply, and the RS232 Serial Interface.
Figure 12. Processor LCD and Piezo
C12
22pF
C13
22pF
2
1
BUZ1
BUZ2
SEL1
SEL2
SEL3
PB1
P1.6
PB2
RESET
RX0
TX0
DUT
P3.3
TIMER 0
P3.5
LCDENABLE
P3.7
J3
PIEZO SOUNDER
X1
22.118 MHz
X2
X1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
J4
P1
J5
P3
40
41
42
43
44
10
11
12
13
15
14
16
17
28
1
2
3
4
5
7
8
9
U7
DS420-44PIN
P1.0/T2
P1.1/T2EX
P1.2/RXD1
P1.3/TXD1
P1.4/INT2
P1.5/INT3
P1.6/INT4
P1.7/INT5
RESET
P3.0/RXD0
P3.1/TXD0
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
X1 (IN)
X2 (OUT)
GND
GND
GND
ALE / PROG
P2.2 (AD10)
P2.3 (AD11)
P2.4 (AD12)
P2.5 (AD13)
P2.6 (AD14)
P2.7 (AD15)
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
P2.0 (AD8)
P2.1 (AD9)
EA / VP
PSEN
13 of 21
GND
VCC
VCC
38
6
36
35
34
33
32
31
30
29
27
26
18
19
20
21
22
23
24
25
39
DUT
SCL
SDA
P0.3
P0.4
P0.5
P0.6
P0.7
EA
PSEN
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
J6
P0
J7
P2
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
DSECASH: eCash Evaluation Kit
P3.7
LCDENABLE
VCC
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
LCD1
LCD AZ
VSS
VDD
CONTRAST
DATA/CMD
READ/WRITE
ENABLE
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
BACKLIGHT +
BACKLIGHT -
R4
10k
R6
2K
LCD