Eurotech BitsyXb - J11: Supercapacitor Input

Hardware Reference
110118-0001A 21
Pin
Name
Pin
Type
Description
17
ROW0
IO
PC0
ADSmartIO
(see section 6.3.6)
19
ROW1
IO
PC1
21
ROW2
IO
PC2
23
ROW3
IO
PC3
25
ROW4
IO
PC4
27
COL0
IO
PA0
29
COL1
IO
PA1
31
COL2
IO
PA2
33
COL3
IO
PA3
RI1
26
I
Serial 1
(EIA-232)
(4.5.1)
DCD1
28
I
DSR1
30
I
DTR1
32
O
RXD1
34
I
TXD1
36
O
CTS1
38
I
RTS1
40
O
35
/EXT_IRQ3
I
External Interrupt 3
37
VDDX
PO
3.3 V
39
MIC_GND P Microphone ground
41
MIC_L
42
AI
Stereo Microphone
MIC_R
44
AI
43
VREF
AO
ADSmartIO A/D reference voltage
45
/RESET_IN
I
External Reset(6.3.1)
47
VDDX
PO
3.3 V
VCC
46
PO 5 V
48
49
I2C_SDA
IO
PC7
I
2
C data
11
GND
50
P
ground
3.3.9 J11: Supercapacitor Input
Board Connector: JST B 2B-ZR-SM3-TF
Recommended Mating Connector: ZH or ZR series
This header provides a connection point for external supercapacitors. See section 5.3.5 for further
details.
Pin
Name
Type
Description
1
SUPCAP+
PI
Positive connection
2
SUPCAP-
PI
Negative connection