User's Manual

Silicon Laboratories Finland Oy
Page 8 of 51
PIO signal
Pad number
Description
PIO[2]
3
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
PIO[3]
4
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
PIO[4]
20
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
PIO[5]
25
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
PIO[6]
18
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
PIO[7]
19
Bi-directional digital in/out with programmable strength and pull-up/pull-
down
AIO[1]
27
Bi-directional analog in/out
Table 3: GPIO Terminal Descriptions
PCM signal
Pad number
Pad type
Description
PCM_OUT
7
Output, weak internal pull-down
Synchronous data output
PCM_IN
11
Input, weak internal pull-down
Synchronous data input
PCM_SYNC
13
Bi-directional, weak internal pull-down
Synchronous data sync
PCM_CLK
12
Bi-directional, weak internal pull-down
Synchronous data clock
Table 4: PCM Terminal Descriptions