Data Sheet

Thundercomm Turbox
TM
SOM Datasheet
- 17 -
Table 3-2. Reset interface definition
PIN Name
PIN
Voltage
Type
Description
Notes
PM_RESIN_N
155
pulled up internally to 1.8V
DI
Volume down/Reset key signal,
Low active
4. PWMs
All PWM output are made by Light Pulse Generators. Independent programmable duty cycle and period via LPGs (6-
or 9-bit resolution) are for digital dimming.
Table 3-3. Pin list for PWMs
Pin Name
IO
Pin
instruction
PWM
DO
275
PM8953 MPP4 PWM control for the external WLED driver
PM8953_GPIO8
DO
154
PWM control for the external WLED driver.
5. Boot configuration
Special boot-related GPIO features:
 They are detected for device bootup during IC reset (during fuse sense).
 After device bootup, use them as normal GPIO interface.
 Do not have pull-ups on Boot configuration GPIO (GPIO_106, GPIO_107, GPIO_109, GPIO_113)
Forced USB boot:
(During development or factory production, boot from USB3.1 port are forced by using GPIO_37.)
 FORCED_USB_BOOT (GPIO_37) always takes precedence, regardless of the state of the BOOT_CONFIG GPIOs
or FAST_BOOT_SEL fuses.
 FORCED_USB_BOOT is checked first during the boot device detection prior to BOOT_CONFIG GPIOs.
 GPIO_37 = 1 forces the SDM device to boot from USB0 port.
Figure 3-3. Power on Signal
C626-P
SOM
GPIO_37
VREG_1.8 V