ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 153

• Manufacturer Part Number: ST72321AR9-Auto
• Description: 8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

ST72321xx-Auto
15.7.7
Table 79.
Symbol
f
f
Rx
Tx
Communication
Table 77.
Extended transmit prescaler division register (SCIETPR)
This register allows setting of the external prescaler rate division factor for the transmit
circuit.
Table 78.
Baud rate selection
Parameter
SCIETPR
frequency
7:0 ERPR[7:0]
7:0 ETPR[7:0]
Bit
Bit
7
Name
Name
SCIERPR register description
SCIETPR register description
8 MHz
f
6
8-bit Extended Transmit Prescaler Register
CPU
8-bit Extended Receive 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
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
the range 1 to 255).
The extended baud rate generator is not used after a reset.
Figure
Figure
Accuracy
standard
~0.16%
~0.79%
versus
5
64) is divided by the binary factor set in the SCIETPR register (in the
64) is divided by the binary factor set in the SCIERPR register (in
Doc ID 13829 Rev 1
Conditions
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]
Prescaler
RW
Function
Function
Serial communications interface (SCI)
3
2
Standard
Reset value: 0000 0000 (00h)
10400
19200
38400
14400
1200
2400
4800
9600
300
1
Baud rate
~10416.67
~19230.77
~38461.54
~14285.71
~1201.92
~2403.84
~4807.69
~9615.38
~300.48
153/243
0
Unit
Hz