AIROC™ Bluetooth® system on chip for automotive applications
Power configurations
5
Power configurations
CYW89820 supports three power configurations as described in the following table.
Table 4
Power configurations
Configuration
Description
VBAT and VDDIO are supplied externally and are used to generate all other supplies on the
VBAT and VDDIO device. Reset may be left floating as it has an internal pull-up, may be connected to an
external RC, or may be driven externally.
PMU is disabled and on-chip regulators are not used. All supplies are provided externally.
Reset is driven from the outside.
External Supplies
On-chip LDOs are used to generate internal supplies but the on-chip buck is not used.
Reset is driven externally.
LDOs and VDDIO
5.1
Configuration 1 - VBAT and VDDIO
In this configuration the device is provided with two supplies (which can also be tied together). RST_N is either
left floating and relies on the internal pull-up to VDDIO to bring the device out of reset or tied to an external RC,
or driven externally. All other required supplies are generated on-chip (see the following figure). Note that VDDIO
must be supplied at the same time or before VBAT is supplied.
The device may require an external reset when any supply voltages drop below 1 V. POR operation not
guaranteed below 1 V.
CYW89820
VBAT
PALDO_VDDIN
PMU_AVDD
SR_PVDD
PA LDO
BUCK
PALDO_VDDOUT
SR_VLX
RFLDO_VDDIN
DIGLDO_VDDIN
RF LDO
RFLDO_VDDOUT
DIGLDO_VDDOUT
DIG LDO
VDDC
RST_N
Radio
IFVDD
VDDIO
VDDIO
PLLVDD
VCOVDD
PAVDD
VDDIO
MIC_AVDD
ADC_AVDDBAT
Figure 6
VBAT and VDDIO configuration
Datasheet
14
002-25826 Rev. *G
2022-09-24
INFINEON [ Infineon ]
