User's Manual

Silicon Laboratories Finland Oy
Page 38 of 45
11.1 Pin States on Reset
Pad name
State
PIO[7:2]
Input, weak pull-down
PCM_OUT
3-state, weak pull-down
PCM_IN
Input, weak pull-down
PCM_SYNC
Input, weak pull-down
PCM_CLK
Input, weak pull-down
UART_TX
3-state, weak pull-up
UART_RX
Input, weak pull-down
UART_RTS
3-state, weak pull-up
UART_CTS
Input, weak pull-down
USB+
Input, weak pull-down
USB-
Input, weak pull-down
SPI_CSB
Input, weak pull-down
SPI_CLK
Input, weak pull-down
SPI_MOSI
Input, weak pull-down
SPI_MISO
3-state, weak pull-down
AIO[1]
Output, driving low
Table 17: Pin States on Reset