ST72F324J2TCRS 데이터 시트보기 (PDF) - STMicroelectronics

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ST72F324J2TCRS

8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI

STMicroelectronics 

On-chip peripherals

ST72324xx-Auto

SCIETPR

Reset value: 0000 0000 (00h)

7

6

5

4

3

2

1

0

ETPR[7:0]

R/W

Table 67. SCIETPR register description

Bit Name

Function

8-bit Extended Transmit Prescaler Register

ct(s) 7:0 ETPR[7:0]

The extended baud rate generator is activated when a value different from 00h

is stored in this register. Therefore the clock frequency issued from the 16

divider (see Figure 57) is divided by the binary factor set in the SCIETPR

register (in the range 1 to 255).

The extended baud rate generator is not used after a reset.

rodu Table 68. Baud rate selection

lete P Symbol Parameter

Conditions

fCPU

Accuracy vs.

Standard

Prescaler

Standard Baud rate Unit

t(s) - Obso fTx

Obsolete Produc fRx

Communication

frequency

8 MHz

~0.16%

~0.79%

Conventional mode

TR (or RR) = 128, PR = 13

TR (or RR) = 32, PR = 13

TR (or RR) = 16, PR = 13

TR (or RR) = 8, PR = 13

TR (or RR) = 4, PR = 13

TR (or RR) = 16, PR = 3

TR (or RR) = 2, PR =13

TR (or RR) = 1, PR = 13

Extended mode

ETPR (or ERPR) = 35,

TR (or RR)= 1, PR = 1

300

1200

2400

4800

9600

10400

19200

38400

14400

~300.48

~1201.92

~2403.84

~4807.69

~9615.38

~10416.67 Hz

~19230.77

~38461.54

~14285.71

130/193

Doc ID 13841 Rev 1

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