MC68HC908QB8 Datasheet, PDF (124/236 Pages) Freescale Semiconductor, Inc – To provide the most up-to-date information, the revision of our documents

Enhanced Serial Communications Interface (ESCI) Module
• Enables the receiver
• Enables ESCI wakeup
• Transmits ESCI break characters
Bit 7
6
5
4
3
2
1
Bit 0
Read:
SCTIE
TCIE
SCRIE
ILIE
TE
RE
RWU
SBK
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 13-10. ESCI Control Register 2 (SCC2)
SCTIE — ESCI Transmit Interrupt Enable Bit
This read/write bit enables the SCTE bit to generate ESCI transmitter interrupt requests. Setting the
SCTIE bit in SCC2 enables the SCTE bit to generate interrupt requests.
1 = SCTE enabled to generate interrupt
0 = SCTE not enabled to generate interrupt
TCIE — Transmission Complete Interrupt Enable Bit
This read/write bit enables the TC bit to generate ESCI transmitter interrupt requests.
1 = TC enabled to generate interrupt requests
0 = TC not enabled to generate interrupt requests
SCRIE — ESCI Receive Interrupt Enable Bit
This read/write bit enables the SCRF bit to generate ESCI receiver interrupt requests. Setting the
SCRIE bit in SCC2 enables the SCRF bit to generate interrupt requests.
1 = SCRF enabled to generate interrupt
0 = SCRF not enabled to generate interrupt
ILIE — Idle Line Interrupt Enable Bit
This read/write bit enables the IDLE bit to generate ESCI receiver interrupt requests.
1 = IDLE enabled to generate interrupt requests
0 = IDLE not enabled to generate interrupt requests
TE — Transmitter Enable Bit
Setting this read/write bit begins the transmission by sending a preamble of 10 or 11 1s from the
transmit shift register to the TxD pin. If software clears the TE bit, the transmitter completes any
transmission in progress before the TxD returns to the idle condition (high). Clearing and then setting
TE during a transmission queues an idle character to be sent after the character currently being
transmitted.
1 = Transmitter enabled
0 = Transmitter disabled
NOTE
Writing to the TE bit is not allowed when the enable ESCI bit (ENSCI) is
clear. ENSCI is in ESCI control register 1.
RE — Receiver Enable Bit
Setting this read/write bit enables the receiver. Clearing the RE bit disables the receiver but does not
affect receiver interrupt flag bits.
1 = Receiver enabled
0 = Receiver disabled
MC68HC908QB8 Data Sheet, Rev. 1
124
Freescale Semiconductor