MC908AP32CFBE Datasheet, PDF (189/324 Pages) Freescale Semiconductor, Inc – The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location.

SCI Functional Description
• SCI transmitter empty (SCTE) — The SCTE bit in IRSCS1 indicates that the IRSCDR has
transferred a character to the transmit shift register. SCTE can generate a transmitter CPU
interrupt request. Setting the SCI transmit interrupt enable bit, SCTIE, in IRSCC2 enables the
SCTE bit to generate transmitter CPU interrupt requests.
• Transmission complete (TC) — The TC bit in IRSCS1 indicates that the transmit shift register and
the IRSCDR are empty and that no break or idle character has been generated. The transmission
complete interrupt enable bit, TCIE, in IRSCC2 enables the TC bit to generate transmitter CPU
interrupt requests.
12.5.3 Receiver
Figure 12-8 shows the structure of the SCI receiver.
MC68HC908AP Family Data Sheet, Rev. 4
Freescale Semiconductor
189