mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 126

• Manufacturer Part Number: mc68hc908qb4
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Enhanced Serial Communications Interface (ESCI) Module
ORIE — Receiver Overrun Interrupt Enable Bit
NEIE — Receiver Noise Error Interrupt Enable Bit
FEIE — Receiver Framing Error Interrupt Enable Bit
PEIE — Receiver Parity Error Interrupt Enable Bit
13.8.4 ESCI Status Register 1
ESCI status register 1 (SCS1) contains flags to signal these conditions:
SCTE — ESCI Transmitter Empty Bit
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This read/write bit enables ESCI error interrupt requests generated by the receiver overrun bit, OR.
This read/write bit enables ESCI error interrupt requests generated by the noise error bit, NE.
This read/write bit enables ESCI error interrupt requests generated by the framing error bit, FE.
This read/write bit enables ESCI receiver interrupt requests generated by the parity error bit, PE.
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This clearable, read-only bit is set when the SCDR transfers a character to the transmit shift register.
SCTE can generate an ESCI transmitter interrupt request. When the SCTIE bit in SCC2 is set, SCTE
generates an ESCI transmitter interrupt request. In normal operation, clear the SCTE bit by reading
SCS1 with SCTE set and then writing to SCDR
1 = ESCI error interrupt requests from OR bit enabled
0 = ESCI error interrupt requests from OR bit disabled
1 = ESCI error interrupt requests from NE bit enabled
0 = ESCI error interrupt requests from NE bit disabled
1 = ESCI error interrupt requests from FE bit enabled
0 = ESCI error interrupt requests from FE bit disabled
1 = ESCI error interrupt requests from PE bit enabled
0 = ESCI error interrupt requests from PE bit disabled
1 = SCDR data transferred to transmit shift register
0 = SCDR data not transferred to transmit shift register
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
Reset:
Read:
Write:
SCTE
Bit 7
1
Figure 13-12. ESCI Status Register 1 (SCS1)
= Unimplemented
TC
6
1
MC68HC908QB8 Data Sheet, Rev. 2
SCRF
5
0
IDLE
0
4
OR
3
0
NF
2
0
FE
1
0
Freescale Semiconductor
Bit 0
PE
0