5. Control Signal Switch Settings
Four of the 5 on-board DIP switches (SW1, 2, 3, 4) are used for configuration of the EVB oscillator locations to match any standard
oscillator pin-out. Using this DIP switch arrangement, the Si5xxUC-EVB can be configured to support all Silicon Labs oscillator devices.
The oscillator device pins that can vary in function, depending on the device variant, are pins 1, 2, 7, and 8 as shown in the Device Pin-
out Mapping table below. Pins 3, 4, 5, and 6 are typically fixed function pins that do not change with device variant.
Note:
All device locations on the Si5xxUC-EVB can support up to 8 pin variant devices. Devices with fewer pins (4, 6 pin) can be instal-
led in the same location and will fit within the 8 pin footprint.
Device Pin-out Mapping
4 pin
Device
6 pin
Device
8 pin
Device
DIP Switch
Function
Options
1
1
1
Pin_1_Ctrl (SW1)
FS/OE/SDA/Vc
-
2
2
Pin_2_Ctrl (SW2)
FS/OE/SCL
2
3
3
-
3
4
4
-
Output
-
5
5
-
Output
4
6
6
-
VDD
-
-
7
Pin_7_Ctrl (SW3)
FS/SDA
-
-
8
Pin_8_Ctrl (SW4)
FS/SCL
Note:
1. Fixed function pins
Configuration details of each of the 4 variable pin function DIP switches is described in following sections. For devices that may not
utilize all 4 of the variable pin function switches, the corresponding unused DIP switch can be set to the NC setting (all Off position).
Make sure to make the following switch settings with the Si5xxUC-EVB powered down. Once all are set appropriately, the board may
be powered on.
UG298: Si5xxUC-EVB
Control Signal Switch Settings
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