Specifications

Pin
Flash Program interface
SWDIO Debug and flash programming I/O
SWDCLK
Debug and flash programming I/O
This is the hardware debug and flash programming of module, J-Link Lite support, please refer
www.segger.com
.
Reference circuitry:
In this section there are 5 reference circuits to show how to design an application circuit with this
module.
Reference Circuit configuration 1
Configurations summary for reference circuit 1
Config no.
Main Supply
EXT Supply Output USB
VDDH
VDD
Config.1 Battery/Ext.regulator N/A Yes Yes
Explanation of symbols in reference circuit 1 schematic
Symbol
Parameter
Min.
Typ.
Max.
Units
V
DDH
Main supply voltage in high voltage mode
2.5
3.7
5.5
V
V
BUS
Supply voltage on VBUS pin 4.35 5 5.5 V
V
EXT
Voltage output on VDD when supplied from internal
regulator (REG0). V
DDH
is the input to REG0.
1.8 3.3 V
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