CM68HC05C4ACFB Motorola / Freescale Semiconductor, CM68HC05C4ACFB Datasheet - Page 72

• Manufacturer Part Number: CM68HC05C4ACFB
• Description: Microcontroller
• Manufacturer: Motorola / Freescale Semiconductor

Serial Communications Interface (SCI)
9.6.2 SCI Control Register 1
General Release Specification
72
SCI control register 1 has these functions:
R8 — Bit 8 (Received)
T8 — Bit 8 (Transmitted)
Address:
•
•
•
When the SCI is receiving 9-bit characters, R8 is the ninth bit of the
received character. R8 receives the ninth bit from the receive shift
register at the same time that the SCDR receives the other eight bits.
Reset has no effect on the R8 bit.
When the SCI is transmitting 9-bit characters, T8 is the ninth bit of the
transmitted character. T8 is loaded into the transmit shift register at
the same time that SCDR is loaded into the transmit shift register.
Reset has no effect on the T8 bit.
Reset:
Read:
Write:
Stores ninth SCI data bit received and ninth SCI data bit
transmitted
Controls SCI character length
Controls SCI wakeup method
Serial Communications Interface (SCI)
$000E
Bit 7
R8
Figure 9-5. SCI Control Register (SCCR1)
= Unimplemented
T8
6
5
0
Unaffected by Reset
M
4
WAKE
3
MC68HC05C4A
2
0
1
0
MOTOROLA
—
Rev. 4.0
Bit 0
0