ST72321R6 STMicroelectronics, ST72321R6 Datasheet - Page 111

• Manufacturer Part Number: ST72321R6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321R6

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt,Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

SERIAL COMMUNICATIONS INTERFACE (Cont’d)
CONTROL REGISTER 2 (SCICR2)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7 = TIE Transmitter interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever
Bit 6 = TCIE Transmission complete interrupt ena-
ble
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever TC=1 in
Bit 5 = RIE Receiver interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever OR=1
Bit 4 = ILIE Idle line interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever IDLE=1
Bit 3 = TE Transmitter enable.
This bit enables the transmitter. It is set and
cleared by software.
0: Transmitter is disabled
1: Transmitter is enabled
TIE
TDRE=1 in the SCISR register
the SCISR register
or RDRF=1 in the SCISR register
in the SCISR register.
7
TCIE
RIE
ILIE
TE
RE
RWU
SBK
0
Notes:
– During transmission, a “0” pulse on the TE bit
– When TE is set there is a 1 bit-time delay before
CAUTION: The TDO pin is free for general pur-
pose I/O only when the TE and RE bits are both
cleared (or if TE is never set).
Bit 2 = RE Receiver enable.
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
Bit 1 = RWU Receiver wake-up.
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.
Bit 0 = SBK Send break.
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.
(“0” followed by “1”) sends a preamble (idle line)
after the current word.
the transmission starts.
start bit
ST72321Rx ST72321ARx ST72321Jx
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