Datasheet

ST72334J/N, ST72314J/N, ST72124J
92/153
SERIAL COMMUNICATIONS INTERFACE (Cont’d)
14.5.6 Low Power Modes
14.5.7 Interrupts
The SCI interrupt events are connected to the
same interrupt vector (see Interrupts chapter).
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).
Mode Description
WAIT
No effect on SCI.
SCI interrupts cause the device to exit from Wait mode.
HALT
SCI registers are frozen.
In Halt mode, the SCI stops transmitting/receiving until Halt mode is exited.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
Transmit Data Register Empty TDRE TIE Yes No
Transmission Complete TC TCIE Yes No
Received Data Ready to be Read RDRF
RIE
Yes No
Overrrun Error Detected OR Yes No
Idle Line Detected IDLE ILIE Yes No