MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 372

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface Modules (SCI1 and SCI2)
17.7.8 SCI Port Data Register
Advance Information
372
NOTE:
Pin function:
Address: SCI1 — 0x00cc_0009
Reset:
Read:
Write:
Serial Communications Interface Modules (SCI1 and SCI2)
PUPSCI — Pullup Enable Bit
Read: Anytime; when DDRSCx = 0, its pin is configured as an input, and
reading PORTSCx returns the pin level; when DDRSCx = 1, its pin is
configured as an output, and reading PORTSCx returns the pin driver
output level.
Write: Anytime; data stored in internal latch drives pin only if DDRSC
bit = 1
RSVD[7:2] — Reserved
PORTSC[1:0] — SCIPORT Data Bits
Writes to SCIPORT do not change the pin state when the pin is
configured for SCI input.
To ensure correct reading of the SCI pin values from SCIPORT, always
wait at least one cycle after writing to SCIDDR before reading SCIPORT.
This read/write bit enables the pullups on pins TXD and RXD. If a pin
is programmed as an output, the pullup is disabled.
Writing to these read/write bits updates their values but has no effect
on functionality.
These are the read/write data bits of the SCI port.
Freescale Semiconductor, Inc.
SCI2 — 0x00cd_0009
For More Information On This Product,
RSVD7
1 = TXD and RXD pullups enabled
0 = TXD and RXD pullups disabled
Bit 7
Figure 17-11. SCI Port Data Register (SCIPORT)
0
Go to: www.freescale.com
RSVD6
6
0
RSVD5
5
0
RSVD4
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
4
0
RSVD3
3
0
RSVD2
2
0
PORTSC1 PORTSC0
TXD
1
0
MOTOROLA
Bit 0
RXD
0