B i o m e t r i c - E X P E V B
12
Rev. 0.4
5. Hardware Overview
5.1. Block Diagram
Figure 11. Biometric-EXP Block Diagram
5.2. Hardware Connectors
As illustrated in Figure 11 there are two separate I
2
C buses implemented on this board. The Si1146 is on its own
bus while the Si7013 and the I
2
C Ribbon Connector J6 are on the second bus. This allows for expansion boards
designed for the I
2
C Ribbon Connector to connect to the Biometric-EXP without the possibility of an I
2
C slave
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.
Table 1. Expansion Connectors (JP3 and JP4)
Pin #
Biometric-EXP Signal Description
WonderGecko Signal
1
GND
GND
2
VMCU
VMCU
3
Red LED D3
PC0
4
Not Used
PD0
5
Green LED D3
PC3
6
Not Used
PD1
7
Si7013 and I
2
C Ribbon Connector (J6) SDA
PC4
EXP Connector
(JP3)
EXP Connector
(JP4)
TS3310 DC-DC
Boost Converter
Si1146 Proximity/
UV/Ambient Light
Sensor
Si7013 Humidity
& Temperature
Sensor
I2C Ribbon
Connector
(J6)
Red
IR
5V
Vmcu
I2C1
All other lines
I2C2
