mc68hc908qz16 Freescale Semiconductor, Inc, mc68hc908qz16 Datasheet - Page 196

• Manufacturer Part Number: mc68hc908qz16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Enhanced Serial Communications Interface (ESCI) Module
15.8 I/O Registers
These I/O registers control and monitor ESCI operation:
15.8.1 ESCI Control Register 1
ESCI control register 1 (SCC1):
LOOPS — Loop Mode Select Bit
ENSCI — Enable ESCI Bit
196
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
This read/write bit enables loop mode operation. In loop mode the RxD pin is disconnected from the
ESCI, and the transmitter output goes into the receiver input. Both the transmitter and the receiver
must be enabled to use loop mode. Reset clears the LOOPS bit.
This read/write bit enables the ESCI and the ESCI baud rate generator. Clearing ENSCI sets the SCTE
and TC bits in ESCI status register 1 and disables transmitter interrupts. Reset clears the ENSCI bit.
1 = Loop mode enabled
0 = Normal operation enabled
1 = ESCI enabled
0 = ESCI disabled
ESCI control register 1, SCC1
ESCI control register 2, SCC2
ESCI control register 3, SCC3
ESCI status register 1, SCS1
ESCI status register 2, SCS2
ESCI data register, SCDR
ESCI baud rate register, SCBR
ESCI prescaler register, SCPSC
ESCI arbiter control register, SCIACTL
ESCI arbiter data register, SCIADAT
Enables loop mode operation
Enables the ESCI
Controls output polarity
Controls character length
Controls ESCI wakeup method
Controls idle character detection
Enables parity function
Controls parity type
Address: $0013
Reset:
Read:
Write:
LOOPS
Bit 7
0
Figure 15-10. ESCI Control Register 1 (SCC1)
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
ENSCI
6
0
TXINV
5
0
M
4
0
WAKE
3
0
ILTY
2
0
PEN
1
0
Freescale Semiconductor
Bit 0
PTY
0