APM32F103RBT7-R datasheet(25/78 Pages) GEEHY

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P a g e 24

USBD1 and USBD2 share register address and pin interface, so only one of them can be used

at the same time.

4.10.7 Simultaneous use of USBD and CAN interfaces

When USBD and CAN are used at the same time, you need to:

 Write 0x00000001 at the base address offset 0x100 of USBD.

 PA11 and PA12 pins are for USBD, and CAN is used to multiplex other pins.

4.11

Analog peripherals

4.11.1 ADC

2 built-in ADCs with 12-bit accuracy, up to 16 external channels; each ADC can realize the

conversion between single mode and scanning mode. It can support DMA operation and

liberate the CPU. ADC interface supports single sampling, synchronous sampling and holding,

and cross sampling and holding logic functions. The analog watchdog function can monitor

multiple channels and generate an interrupt when the monitored signal exceeds the preset

value.

The timer can be used to synchronize the analog-to-digital conversion with the clock.

4.11.1.1 Temperature sensor

An embedded temperature sensor connected to ADC1_IN16 input channel can convert the

ambient temperature of the chip into digital signal.

4.12

SWJ-DP

The product supports serial debugging interface (SW-DP) and JTAG (JTAG-DP) debugging

interface.

JTAG interface provides 5-pin standard JTAG interface for AHB access port.

SW-DP interface provides 2-pin (data + clock) interface for AHB module. Among them, some

of 2 pins of SW-DP interface and 5 pins of JTAG interface are multiplexed.

4.13

Timer

The product includes 1 advanced-control timer (TMR1), 3 general-purpose timers (TMR2/3/4)

and 1 system tick timer.

The following table compares the functions of advanced timer and general-purpose timer:

Table9 Function Comparison of Timers

Timer type

System tick timer

General-purpose timer

Advanced timer

Timer name

Sys Tick Timer

TMR2

TMR3

TMR4

TMR1

Counter

resolution

24 bits

16 bits

Counter type

Down

Up, down, up/down

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