ST72321B STMICROELECTRONICS [STMicroelectronics], ST72321B Datasheet - Page 108
ST72321B
Manufacturer Part Number
ST72321B
Description
64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST72321B.pdf
(187 pages)
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SERIAL COMMUNICATIONS INTERFACE (Cont’d)
10.6.5 Low Power Modes
108/187
Mode
WAIT
HALT
No effect on SCI.
SCI interrupts cause the device to exit from
Wait mode.
SCI registers are frozen.
In Halt mode, the SCI stops transmitting/re-
ceiving until Halt mode is exited.
Description
10.6.6 Interrupts
The SCI interrupt events are connected to the
same interrupt vector.
These events generate an interrupt if the corre-
sponding Enable Control Bit is set and the inter-
rupt mask in the CC register is reset (RIM instruc-
tion).
Transmit Data Register
Empty
Transmission Com-
plete
Received Data Ready
to be Read
Overrun Error Detect-
ed
Idle Line Detected
Parity Error
Interrupt Event
Event
TDRE
RDRF
IDLE
Flag
OR
TC
PE
Control
Enable
TCIE
RIE
ILIE
TIE
PIE
Bit
from
Wait
Exit
Yes
Yes
Yes
Yes
Yes
Yes
from
Exit
Halt
No
No
No
No
No
No
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