MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 267
MC68HC908AP16CFA
Manufacturer Part Number
MC68HC908AP16CFA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AP16CFA.pdf
(440 pages)
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14.6.3.6 Receiver Wakeup
MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
The maximum percent difference between the receiver count and the
transmitter count of a fast 9-bit character with no errors is
So that the MCU can ignore transmissions intended only for other
receivers in multiple-receiver systems, the receiver can be put into a
standby state. Setting the receiver wakeup bit, RWU, in IRSCC2 puts the
receiver into a standby state during which receiver interrupts are
disabled.
Depending on the state of the WAKE bit in IRSCC1, either of two
conditions on the RxD pin can bring the receiver out of the standby state:
Clearing the WAKE bit after the RxD pin has been idle may cause the
receiver to wake up immediately.
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
Address mark — An address mark is a logic 1 in the most
significant bit position of a received character. When the WAKE bit
is set, an address mark wakes the receiver from the standby state
by clearing the RWU bit. The address mark also sets the SCI
receiver full bit, SCRF. Software can then compare the character
containing the address mark to the user-defined address of the
receiver. If they are the same, the receiver remains awake and
processes the characters that follow. If they are not the same,
software can set the RWU bit and put the receiver back into the
standby state.
Idle input line condition — When the WAKE bit is clear, an idle
character on the RxD pin wakes the receiver from the standby
state by clearing the RWU bit. The idle character that wakes the
receiver does not set the receiver idle bit, IDLE, or the SCI receiver
full bit, SCRF. The idle line type bit, ILTY, determines whether the
receiver begins counting logic 1s as idle character bits after the
start bit or after the stop bit.
Go to: www.freescale.com
170 176
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Infrared Serial Communications Interface Module (IRSCI)
170
–
×
100
=
3.53%
SCI Functional Description
Data Sheet
267
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