ST72F324BJ STMICROELECTRONICS [STMicroelectronics], ST72F324BJ Datasheet - Page 121

• Manufacturer Part Number: ST72F324BJ
• Description: 8-bit MCU, 3.8 to 5.5 V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72324B
Table 67.
Symbol
f
f
Tx
Rx
Communication
frequency
Table 65.
SCI Extended Transmit Prescaler Division Register (SCIETPR)
This register is used to set the External Prescaler rate division factor for the transmit circuit.
Table 66.
Baud rate selection
Parameter
SCIETPR
Bit
7:0
Bit
7:0
7
ERPR[7:0]
ETPR[7:0]
Name
Name
SCIERPR register description
SCIETPR register description
8 MHz
f
CPU
6
8-bit Extended Receive Prescaler Register
8-bit Extended Transmit Prescaler Register
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
register (in the range 1 to 255).
The extended baud rate generator is not used after a reset.
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
register (in the range 1 to 255).
The extended baud rate generator is not used after a reset.
Accuracy vs.
Standard
~0.16%
~0.79%
5
Figure
Figure
Conditions
59) is divided by the binary factor set in the SCIERPR
59) is divided by the binary factor set in the SCIETPR
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
4
ETPR[7:0]
R/W
Prescaler
Function
Function
3
2
Standard
Reset value: 0000 0000 (00h)
10400
19200
38400
14400
1200
2400
4800
9600
300
On-chip peripherals
1
~10416.67
~19230.77
~38461.54
~14285.71
Baud rate
~1201.92
~2403.84
~4807.69
~9615.38
~300.48
121/188
0
Unit
Hz