MC908JB16DWE Datasheet, PDF (238/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Communications Interface
12.9.4 SCI Status Register 1
SCI status register 1 (SCS1) contains flags to signal these conditions:
• Transfer of SCDR data to transmit shift register complete
• Transmission complete
• Transfer of receive shift register data to SCDR complete
• Receiver input idle
• Receiver overrun
• Noisy data
• Framing error
• Parity error
Address: $005D
Bit 7
6
5
4
3
2
1
Bit 0
Read: SCTE
TC
SCRF IDLE
OR
NF
FE
PE
Write:
Reset: 1
1
0
0
0
0
0
0
= Unimplemented
Figure 12-12. SCI Status Register 1 (SCS1)
SCTE — SCI Transmitter Empty Bit
This clearable, read-only bit is set when the SCDR transfers a
character to the transmit shift register. SCTE can generate an SCI
transmitter CPU interrupt request. When the SCTIE bit in SCC2 is set,
SCTE generates an SCI transmitter CPU interrupt request. In normal
operation, clear the SCTE bit by reading SCS1 with SCTE set and
then writing to SCDR. Reset sets the SCTE bit.
1 = SCDR data transferred to transmit shift register
0 = SCDR data not transferred to transmit shift register
Technical Data
238
Serial Communications Interface Module (SCI)
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor