Datasheet

7
7
4.0 Schematic of the LMxx Evaluation Board
Figure 4. LMxx Evaluation Board Schematic
C1
0.1uF
SDA
C6
0.1uF
LMxx
R13
1.5K
SCL
TP1
C10
33pF
R1
0
R14
1.5K
HEADER 1X7
GND
ALERT#
J4
HEADER 2x2
34
12
Y1
12 MHz
+3.3 VDC
C9
33pF
+ 3.3 VDC
Shunt to select the PCB
temperature diode.
TP2
+ 3.3 VDC
C13
100 pF
SCL
TP4
U3
1
2
3
54
6
8
7
VDD
D+
D-
GNDTCRIT#
ALERT#
SMBCLK
SMBDAT
R9 22
SDA
GND
U1
LP2950CDT-3.3/TO252
1 3
IN OUT
C18
0.1uF
L1
R4
1M
ALERT#
R11 1.5K
SDA
C11
2.2uF
C19
2.2 nF
ALERT#
GND
SCL
U2
CY7C64603-52NC
17 4 15 16
2
1
3
14
10
11
5 29
21 8
6 7 30 31 32 33 34
35
36
43
44
45
46
48
49
50
51
25
24
18
9
12
28
27
39 47 52
40
42
41
37
38 22 23
19 20
13 26
RESERVED_3
WAKEUP#
RESERVED_2
XCLKSEL
SCL
Vcc1
SDA
Vcc2
PA4/FWR#
PA5/FRD#
AVcc
PB0/T2
Gnd2
AGnd
XIN
XOUT
PB1/T2EX
PB2/RXD1
PB3/TXD1
PB4/INT4
PB5/INT5#
PB6/INT6
PB7/T2OUT
PC0/RxD0
PC1/TxD0
PC2/INT0#
PC3/INT1#
PC4/T0
PC5/T1
PC6/WR#
PC7/RD#
USBD+
USBD-
DISCON#
RESERVED_1
CLKOUT
RESET#
Vcc3
Gnd4
Gnd5
Gnd6
Vcc4
RDY2/AOE
CTL0/AINFLAG
CTL2/AOUTFLAG
XCLK
RESERVED_4
RESERVED_5
RESERVED_6
RESERVED_7
Gnd1
Gnd3
C17
0.1uF
TP3
R2
1.5K
SDA
C2
0.1uF
C14
2.2uF
C12
0.1uF
TCRIT
C5
0.1uF
J3
USB-B
1
2
3
4
5
6
VBUS
D-
D+
GND
SHELL_1
SHELL_2
R3
100k
C3
0.1uF
R15
1.5K
GND
+ 3.3 VDC
C20
0.1uF
GND
U4
AT24C02-10SI-2.7
1
2
3
4
8
7
6
5
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
C4
0.1uF
C15
0.1uF
R12
1M
JP2
1
3
4
5
6
7
2
Use a 0.1 uF capacitor for each
Vcc pin of U2 and Reserved_6 pin.
TCRIT
1 uH
+ 3.3 VDC
R7 22
C16
2.2uF
SCL
ALERT#
Q1
MMBT3904/SOT