GD32F310 datasheet(64/81 Pages) GIGADEVICE

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GD32F310xx Datasheet

4.18

USART characteristics

Table 4-37

. USART characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fSCK

SCK clock frequency

fPCLKx = 72 MHz

—

MHz

tSCK(H)

SCK clock high time

fPCLKx = 72 MHz

13.8

—

tSCK(L)

SCK clock low time

fPCLKx = 72 MHz

13.8

—

(1)

Guaranteed by design, not tested in production.

4.19

TIMER characteristics

Table 4-38

. TIMER characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

tres

Timer resolution time

—

tTIMERxCLK

fTIMERxCLK = 72 MHz

13.9

—

fEXT

Timer external clock

frequency

—

fTIMERxCLK/2

MHz

fTIMERxCLK = 72 MHz

MHz

RES

Timer resolution

—

bit

tCOUNTER

16-bit counter clock period

when internal clock is

selected

—

65536

tTIMERxCLK

fTIMERxCLK = 72 MHz

0.0139

910

μs

tMAX_COUNT

Maximum possible count

—

65536 × 65536 tTIMERxCLK

fTIMERxCLK = 72 MHz

—

59.6

(1)

Guaranteed by design, not tested in production.

4.20

WDGT characteristics

Table 4-39. FWDGT min/max timeout period at 40 kHz (IRC40K)(1)

Prescaler divider

PSC[2:0] bits

Min timeout RLD[11:0]

= 0x000

Max timeout RLD[11:0] =

0xFFF

Unit

1/4

000

0.025

409.525

1/8

001

0.025

819.025

1/16

010

0.025

1638.025

1/32

011

0.025

3276.025

1/64

100

0.025

6552.025

1/128

101

0.025

13104.025

1/256

110 or 111

0.025

26208.025

(1)

Guaranteed by design, not tested in production.

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