MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 338

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

Serial Communications Interface Modules (SCI1 and SCI2)
Technical Data
338
0 X
1
0
1 Single-wire Tied to TXD
Normal
Table 16-3. SCI Normal, Loop, and Single-Wire Mode Pin Configurations
Mode
Loop
SCI
Tied to RXD input buffer
Tied to transmitter output
Serial Communications Interface Modules (SCI1 and SCI2)
WOMS — Wired-OR Mode Select Bit
RSRC — Receiver Source Bit
M — Data Format Mode Bit
Receiver
Input
This read/write bit configures the TXD and RXD pins for open-drain
operation. This allows all of the TXD pins to be tied together in a
multiple-transmitter system. WOMS also affects the TXD and RXD
pins when they are general-purpose outputs. External pullup resistors
are necessary on open-drain outputs. Reset clears WOMS.
This read/write bit selects the internal feedback path to the receiver
input when LOOPS = 1. Reset clears RSRC.
This read/write bit selects 11-bit or 10-bit frames. Reset clears M.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = TXD and RXD pins open-drain when outputs
0 = TXD and RXD pins CMOS drive when outputs
1 = Receiver input tied to TXD pin when LOOPS = 1
0 = Receiver input tied to transmitter output when LOOPS = 1
1 = Frames have 1 start bit, 9 data bits, and 1 stop bit.
0 = Frames have 1 start bit, 8 data bits, and 1 stop bit.
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Receive pin
General-
purpose I/O
Function
RXD
Pin
X Tied to TXD output driver
0 Tied to receiver input only
1
0 No connection
1 Tied to TXD output driver
Tied to receiver input
and TXD output driver
Transmitter
Output
MMC2107 – Rev. 2.0
Transmit pin
None (idles high)
Transmit pin
Receive pin
Transmit pin
Function
MOTOROLA
TXD
Pin