Hardware Overview - Silicon Laboratories Biometric EXP EVB UG User Manual

Biometric EXP EVB UG

6. Hardware Overview

6.1. Block Diagram
EXP Connector
(JP3)
I2C2
6.2. Hardware Connectors
As illustrated in Figure 17 there are two separate I
bus while the Si7013 and the I2C Ribbon Connector J6 are on the second bus. This allows for expansion boards
2
designed for the I C Ribbon Connector to connect to the Biometric-EXP without the possibility of an I
address conflict between any potential Si1145/Si1146/Si1147 devices on the expansion board.
Table 1 details the pinouts and signal function of the Biometric-EXP connectors JP3 and JP4.
Pin #
1 GND
2 VMCU
3 Red LED D3
4 Not Used
5 Green LED D3
6 Not Used
7 Si7013 and I
18
Vmcu
All other lines
TS3310 DC-DC
Boost Converter
Si1146 Proximity/
UV/Ambient Light
Sensor
I2C1
Si7013 Humidity
& Temperature
Sensor
Figure 17. Biometric-EXP Block Diagram
2
C buses implemented on this board. The Si1146 is on its own
Table 1. Expansion Connectors (JP3 and JP4)
Biometric-EXP Signal Description
2
C Ribbon Connector (J6) SDA
Rev. 0.1
EXP Connector
(JP4)
I2C Ribbon
Connector
5V
(J6)
Red
IR
WonderGecko Signal
GND
VMCU
PC0
PD0
PC3
PD1
PC4
2
C slave