AN2502 Freescale Semiconductor / Motorola, AN2502 Datasheet - Page 35
AN2502
Manufacturer Part Number
AN2502
Description
Using Two Channels of the HC08 TIM to Achieve a Full-Duplex Software SCI
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN2502.pdf
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MOTOROLA
Using Two Channels of the HC08 TIM to Achieve a Full-Duplex Software SCI
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Figure 34. SCI Send — Enhanced Mode
YES
NO
CONFIGURE CH1 AS
DEPENDING ON
MSB TO INDICATE
CLEAR Tx STATUS
FLAGS IN STATUS
CLEAR ON OC TO
SET LEFT BIT OF
SEND START BIT
TO Tx CHANNEL
Tx SHIFT REG =
ADD 1 BIT-TIME
TRANSMITTER
EMPTY FLAG
Tx DATA REG
EMPTY FLAG
REGISTER 2
ENABLED?
END OF TX
CHANNEL
ACTIVE?
SCISend
SB = 1?
CLEAR
RTS
SET
TX
Tx
Tx
YES
NO
NO
M
YES
TO Tx CHANNEL
ADD 1 BIT-TIME
AN2502/D
Software
35
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