Data Sheet

SPI
MISO selected by SPI_PIO#.
15
SPI_MOSI
Programmable I/O line or debug
SPI
MOSI selected by SPI_PIO#.
SPI data output
16
SPI_CLK
Programmable I/O line or debug
SPI
CLK selected by SPI_PIO#.
SPI CLOCK
17
SPI_CSB
Programmable I/O line or debug
SPI chip select (CSB) selected by
SPI_PIO#.
chip select for SPI, active low
20
RESET
The RESET pin is an active high reset
and is internally filter educing the
internal low frequency clock
oscillator .A reset will be performed
between1.5 and 4.0ms following
RESET being active.
Reset if low. Pull low for
minimum 5ms to cause a
reset.
22
LED_1
Bidirectional
Programmable
Input/Output Line & LED
driver
23
LED_0
Bidirectional
Programmable
Input/Output Line & LED
driver
24
POWER_VRE
G
Enable pin for the internal 1.8V
regulator, This pin is only available
with production version
Regulator enable input.
Can also be sensed as an
input.
Regulator enable and
multifunction button. A high
input (tolerant to VBAT)
enables the on-chip
regulators, which can then
be latched on internally and
the button used as a
multifunction input.
26
VBUS
Power supply and control
Charger input.
Typically connected to VBUS
(USB supply)
27
CHG_EXT
Power supply and control
External battery charger
control.
External battery charger
transistor base control when
using external charger