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Serial Communication Controllers (SCCs)
7-154
MC68360 USER’S MANUAL
In normal UART mode with 16
× oversampling, the FSB bits (14–11) in the DSR are decoded
as follows:
1111 = Last Transmitted Stop Bit 16/16 (the default value after reset)
1110 = Last Transmitted Stop Bit 15/16
1101 = Last Transmitted Stop Bit 14/16
1100 = Last Transmitted Stop Bit 13/16
1011 = Last Transmitted Stop Bit 12/16
1010 = Last Transmitted Stop Bit 11/16
1001 = Last Transmitted Stop Bit 10/16
1000 = Last Transmitted Stop Bit 9/16
0xxx = Invalid. Do not use.
When the UART is configured for 32
× oversampling, the FSB bits (14–11) in the DSR are
decoded as follows:
1111 = Last Transmitted Stop Bit 32/32 (the default value after reset)
1110 = Last Transmitted Stop Bit 31/32
1101 = Last Transmitted Stop Bit 30/32
1100 = Last Transmitted Stop Bit 29/32
1011 = Last Transmitted Stop Bit 28/32
1010 = Last Transmitted Stop Bit 27/32
1001 = Last Transmitted Stop Bit 26/32
1000 = Last Transmitted Stop Bit 25/32
0111 = Last Transmitted Stop Bit 24/32
0110 = Last Transmitted Stop Bit 23/32
0101 = Last Transmitted Stop Bit 22/32
0100 = Last Transmitted Stop Bit 21/32
0011 = Last Transmitted Stop Bit 20/32
0010 = Last Transmitted Stop Bit 19/32
0001 = Last Transmitted Stop Bit 18/32
0000 = Last Transmitted Stop Bit 17/32
When the UART is configured for 8
× oversampling, the FSB bits (14–11) in the DSR are de-
coded as follows:
1111 = Last Transmitted Stop Bit 8/8 (the default value after reset)
1110 = Last Transmitted Stop Bit 7/8
1101 = Last Transmitted Stop Bit 6/8
1100 = Last Transmitted Stop Bit 5/8
10xx = Invalid. Do not use.
01xx = Invalid. Do not use.
00xx = Invalid. Do not use.
The UART receiver can always receive fractional stop bits. The next character’s start bit may
begin at any time after the three middle samples of the stop bit have been taken.
7.10.16.14 UART ERROR-HANDLING PROCEDURE. The UART controller reports char-
acter reception and transmission error conditions via the channel BDs, the error counters,
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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