psoc6-evaluationkit-062S2 ADC0 return value not right when connecting with VDD (3.3V)

Environment

board : psoc6-evaluationkit-062S2
bsp : PSOC62-IFX-EVAL-KIT 1.1.1
rt-thread : 5.0.1
RT-Thread Studio : 2.2.6

I had a problem when I tried to run this code below

#include <rtthread.h>

#define DBG_TAG "main"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
#include <board.h>
#include <rtdevice.h>

#define ADC_DEV_NAME "adc1"
#define ADC_DEV_CHANNEL 0
#define REFER_VOLTAGE 330
#define CONVERT_BITS (1 << 12)

rt_thread_t Adc_thread = RT_NULL;

static void Adc_entry(void* paremeter);

int main(void)
{
Adc_thread = rt_thread_create("adc1", Adc_entry, RT_NULL, 512, 16, 20);
if(Adc_thread != RT_NULL)
rt_thread_startup(Adc_thread);
else
return -1;
}

static void Adc_entry(void* paremeter)
{
rt_adc_device_t adc_dev;
rt_uint32_t value,vol;
rt_err_t ret = RT_EOK;
adc_dev = (rt_adc_device_t)rt_device_find(ADC_DEV_NAME);
if (adc_dev == RT_NULL)
{
rt_kprintf("adc sample run failed! can't find %s device!\n", ADC_DEV_NAME);
}
ret = rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
if(ret == RT_EOK)
{
rt_kprintf("adc sample run success! find %s device!\n", ADC_DEV_NAME);
}
while(1)
{
value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL);
rt_kprintf("the value is :%d \n", value);
vol = value * REFER_VOLTAGE / CONVERT_BITS;
rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
rt_thread_delay(500);
}
}

My Config

The ADC config is initialized as 12-bit resolution and I connect ADC0 (P10_0) with VDD

Result

The return value (2047) is not right which is half of 4096 (3.3V)

Start with the ADC0/P10_0 configuration for the psoc6-evaluationkit-062S2 and trace the calls to rt_device_find, rt_adc_enable, and rt_adc_read. Reproduce the reading with ADC0 connected to VDD and compare the configured 12-bit resolution and board mapping with the observed 2047 value. Done means the ADC reports the expected full-scale value or the issue identifies the responsible configuration or driver behavior.