Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
12:13 PRESCALER
RW
A
0
Prescaler for real time clock used when
WCO_BYPASS=1 and CLK_SEL = WCO. Configure
this field before enabling the WCO, and do not change
this setting when WCO_EN=1.
0: 32768 Hz square wave. Connect a 32768 Hz square
wave to WCO output pin. Do not connect WCO input
pin.
1: reserved
2: reserved
3: reserved
16
WCO_BYPASS
RW
A
0
Configures the WCO for different board-level
connections to the WCO pins. For example, this can
be used to connect an external watch crystal oscillator
instead of a watch crystal. In all cases, the two related
GPIO pins (WCO input and output pins) must be
configured as analog connections using GPIO
registers, and they must be hooked at the board level
as described below. Configure this field before
enabling the WCO, and do not change this setting
when WCO_EN=1.
0: Watch crystal. Connect a 32.768 kHz watch crystal
between WCO input and output pins.
1: Clock signal, either a square wave or sine wave.
See PRESCALER field for connection information.
17:18 VDDBAK_CTL
RW
A
0
Controls the behavior of the switch that generates
vddbak from vbackup or vddd.
0: automatically select vddd if its brownout detector
says it is valid. If the brownout says its not valid, then
use vmax which is the highest of vddd or vbackup.
1,2,3: force vddbak and vmax to select vbackup,
regardless of its voltage.
19
VBACKUP_MEAS
RW
A
0
Connect vbackup supply to the vbackup_meas output
for measurement by an ADC attached to
amuxbusa_adft_vddd. The vbackup_meas signal is
scaled to 10 percent of vbackup, so it is within the
supply range of the ADC.
24:31 EN_CHARGE_KEY
RW
A
0
When set to 3C, the supercap charger circuit is
enabled. Any other code disables the supercap
charger. THIS CHARGING CIRCUIT IS FOR A
SUPERCAP ONLY AND CANNOT SAFELY CHARGE
A BATTERY. DO NOT WRITE THIS KEY WHEN
VBACKUP IS CONNECTED TO A BATTERY.
10
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers