Specifications

Differences vs. ’C240 SCI
8-3 Serial Communications Interface (SCI)
- Two wake-up multiprocessor modes that can be used with either commu-
nications format
J Idle-line wake up
J Address-bit wake up
- Half- or full-duplex operation
- Double-buffered receive and transmit functions
- Transmitter and receiver can be operated by interrupts or by polling using
status flags:
J Transmitter: TXRDY flag (transmitter buffer register is ready to re-
ceive another character from the CPU core) and TX EMPTY flag
(transmit shift register is empty)
J Receiver: RXRDY flag (receive buffer register ready to receive anoth-
er character from the external world), BRKDT flag (break condition oc-
curred), and RX ERROR monitoring four interrupt conditions
- Separate enable bits for transmitter and receiver interrupts (except break)
- NRZ (non-return-to-zero) format