s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 136

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Enhanced Serial Communications Interface (ESCI) Module
13.7.2 ESCI Receive Data (RxD)
The RxD pin is the serial data input to the ESCI receiver. When the ESCI is enabled, the RxD pin becomes
an input.
13.8 Registers
The following registers control and monitor operation of the ESCI:
13.8.1 ESCI Control Register 1
ESCI control register 1 (SCC1):
LOOPS — Loop Mode Select Bit
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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.
1 = Loop mode enabled
0 = Normal operation enabled
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
Reset:
Read:
Write:
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
LOOPS
Bit 7
0
Figure 13-9. ESCI Control Register 1 (SCC1)
ENSCI
6
0
TXINV
5
0
M
4
0
WAKE
3
0
ILTY
2
0
PEN
1
0
Freescale Semiconductor
Bit 0
PTY
0