User's Manual

FLC-BTM101 Datasheet
Flaircomm Microelectronics Confidential
-15-
Power-on Reset
Type
Unit
Reset release on VDD_DIG rising
1.05
V
Reset assert on VDD_DIG falling
1.00
Reset assert on VDD_DIG falling (Sleep mode)
0.60
Hysteresis
50
mV
Table 4: Power-on Reset
4.3 General Purpose Digital IO
12 lines of programmable bidirectional I/O are provided. They are all powered from VDD_PIO.
PIO lines are software configurable as weak pull-up, weak pull-down, strong pull-up or strong pull-
down.
NOTE: at reset all PIO lines are input with weak pull-downs.
Any of the PIO line can be configured as interrupt request line or as weak-up lines from sleep modes.
The BTM101 supports alternative functions on the PIO lines:
 SPI interface,
 UART.
 LED flashing / PWM module.
NOTE: Implementation of the PIO lines is firmware build specific.
4.4 General Purpose Analogue IO
BTM101 has 3 general purpose analog interface pins, AIO [2:0].