HT32F1253_12 datasheet(9/35 Pages) HOLTEK

9 / 35 page

Rev. 1.10

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Power Management

▀ Single 3.3V power supply: 2.7V to 3.6V

▀ Integrated 1.8V LDO regulator for core and peripheral power supply

▀ VBAT battery power supply for RTC and backup registers

▀ Three power domains: 3.3V, 1.8V and Backup

▀ Four power saving modes: Sleep, Deep-Sleep1, Deep-Sleep2, Power-Down

The Power consumption can be regarded as one of the most important issues for many embedded

system applications. Accordingly the Power Control Unit, PWRCU, in these devices provides many

types of power saving modes such as Sleep, Deep-Sleep1, Deep-Sleep2 and Power-Down mode.

These operating modes reduce the power consumption and allow the application to achieve the best

trade-off between the conflicting demands of CPU operating time, speed and power consumption.

(NOTE: HT32F1251B does not support VBAT battery power supply).

Analog to Digital Converter

▀ 12-bit SAR ADC engine

▀ Up to 1 Msps conversion rate - 1 μs at 56MHz, 1.17μs at 72MHz

▀ 8 external analog input channels

▀ Supply voltage range: 2.7V ~ 3.6V

▀ Conversion range: VSSA ~ VDDA

A 12-bit multi-channel ADC is integrated in the device. There are a total of 10 multiplexed

channels, which include 8 external channels on which the external analog signals can be measured,

and 2 internal channels. If the input voltage is required to remain within a specific threshold

window, the Analog Watchdog function will monitor and detect the signal. An interrupt will then

be generated to inform that the input voltage is higher or lower than the set thresholds. There are

three conversion modes to convert an analog signal to digital data. The ADC can be operated in

one shot, continuous and discontinuous conversion modes.

Analog Operational Amplifier/Comparator

▀ 2 Operational Amplifiers or 2 Comparator functions which are software configurable

▀ Supply voltage range: 2.7V ~ 3.6V

Two Operational Amplifiers/Comparators (OPA/CMP) are implemented within the devices. They

can be configured either as Operational Amplifiers or as Analog Comparators. When configured as

comparators, they are capable of asserting interrupts to the NVIC.

HT32F1253 Datasheet(PDF) 9 Page - Holtek Semiconductor Inc