MC9S08GB60 Datasheet, PDF (179/290 Pages) Motorola, Inc – Microcontrollers

SCI Registers and Control Bits
SCISWAI — SCI Stops in Wait Mode
1 = SCI clocks freeze while CPU is in wait mode.
0 = SCI clocks continue to run in wait mode so the SCI can be the source of an interrupt that wakes
up the CPU.
RSRC — Receiver Source Select
This bit has no meaning or effect unless the LOOPS bit is set to 1. When LOOPS = 1, the receiver input
is internally connected to the TxD1 pin and RSRC determines whether this connection is also
connected to the transmitter output.
1 = Single-wire SCI mode where the TxD1 pin is connected to the transmitter output and receiver
input.
0 = Provided LOOPS = 1, RSRC = 0 selects internal loop back mode and the SCI does not use the
RxD1 or TxD1 pins.
M — 9-Bit or 8-Bit Mode Select
1 = Receiver and transmitter use 9-bit data characters
start + 8 data bits (LSB first) + 9th data bit + stop.
0 = Normal — start + 8 data bits (LSB first) + stop.
WAKE — Receiver Wakeup Method Select
Refer to Section 11.6.3, “Receiver Wakeup Operation,” for more information.
1 = Address-mark wakeup.
0 = Idle-line wakeup.
ILT — Idle Line Type Select
Setting this bit to 1 ensures that the stop bit and logic 1 bits at the end of a character do not count toward
the 10 or 11 bit times of the logic high level by the idle line detection logic. Refer to Section 11.6.3.1,
“Idle-Line Wakeup,” for more information.
1 = Idle character bit count starts after stop bit.
0 = Idle character bit count starts after start bit.
PE — Parity Enable
Enables hardware parity generation and checking. When parity is enabled, the most significant bit
(MSB) of the data character (eighth or ninth data bit) is treated as the parity bit.
1 = Parity enabled.
0 = No hardware parity generation or checking.
PT — Parity Type
Provided parity is enabled (PE = 1), this bit selects even or odd parity. Odd parity means the total
number of 1s in the data character, including the parity bit, is odd. Even parity means the total number
of 1s in the data character, including the parity bit, is even.
1 = Odd parity.
0 = Even parity.
MC9S08GB/GT Data Sheet, Rev. 2.3
Freescale Semiconductor
179