ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 151

• 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
15.7.4
15.7.5
Table 75.
Data register (SCIDR)
This register contains the Received or Transmitted data character, depending on whether it
is read from or written to.
The Data register performs a double function (read and write) since it is composed of two
registers, one for transmission (TDR) and one for reception (RDR).
The TDR register provides the parallel interface between the internal bus and the output
shift register (see
The RDR register provides the parallel interface between the input shift register and the
internal bus (see
Baud rate register (SCIBRR)
SCIDR
SCIBRR
Bit Name
2
1
0
7
7
RWU
SBK
RE
SCP[1:0]
RW
Receiver enable
Receiver wake-up
Send break
SCICR2 register description (continued)
This bit enables the receiver. It is set and cleared by software.
0: Receiver is disabled
1: Receiver is enabled and begins searching for a start bit
This bit determines if the SCI is in mute mode or not. It is set and cleared by software
and can be cleared by hardware when a wake-up sequence is recognized.
0: Receiver in Active mode
1: Receiver in Mute mode
Note: Before selecting Mute mode (setting the RWU bit), the SCI must receive some
data first, otherwise it cannot function in Mute mode with wake-up by idle line
detection.
This bit set is used to send break characters. It is set and cleared by software.
0: No break character is transmitted
1: Break characters are transmitted
Note: If the SBK bit is set to ‘1’ and then to ‘0’, the transmitter sends a BREAK word
at the end of the current word.
6
6
Figure
Figure
62).
62).
5
5
Doc ID 13829 Rev 1
SCT[2:0]
RW
4
4
DR[7:0]
RW
Function
Serial communications interface (SCI)
3
3
2
2
Reset value: 0000 0000 (00h)
Reset value: Undefined
SCR[2:0]
RW
1
1
151/243
0
0