Hardware Reference
110121-4001A
17
Pin
Name
Pin
Type
Description
39
MIC_GND
P
Microphone ground
41
MIC_L
42
AI
Stereo Microphone
MIC_R
44
AI
43
reserved
45
/RESET_IN
I
External reset
47
VDDX
PO
3.3 V
VCC
46
PO
5 V
48
49
I2C_SDA
IO
PC7
I
2
C data
8
GND
50
P
Ground
3.3.7
J11 (J7): Supercapacitor Input
Supercapacitors are not supported by the Bitsy G5. This socket may not be populated on all
boards.
3.3.8
J16 (J1): JTAG/In-System Programming
Board Connector: 2x10 shrouded header, 2 mm, Samtec STMM-110-02-T-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-110-02-F-D-500)
This header is used during manufacturing for programming and debug, but is not otherwise
supported for application use. Production customers may use this header to reprogram boot code.
Pin
Name
Type
Description
1
/PM_RSTMCU
I
System reset
2
/TRST
I
JTAG
3
TMS
I
4
GND
P
5
TCLK
I
6
GND
P
7
TDI
I
8
GND
P
9
TDO
O
10
GND
P
11
RTCK
O
12
JTAG_VREF
PO
Reference voltage
13
PRG
I
ATMega/ADSmartIO
14
VDDX
PO
AVR Vref
15
MISO
O
ATMega/ADSmartIO
16
/DE
I
JTAG
17
MOSI
I
ATMega/ADSmartIO
18
GND
P
19
SCK
I
20
GND
P