MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
21-5
The UART uses the standard NRZ mark/space data format illustrated in Figure 21-5.
Each data character is contained in a frame that includes a start bit, eight or nine data bits, and a
stop bit. Clearing the M bit in SCI Control Register 1 (SCICR) configures the SCI for 8-bit data
characters. A frame with eight data bits has a total of 10 bits, including a start bit and a stop bit.
Setting the M bit configures the UART for nine-bit data characters. When the UART is
configured for 9-bit data characters, the ninth data bit is the T8 or R8 bit in the SCIDR. T8
remains unchanged after transmission and can be used repeatedly without rewriting it. A frame
with nine data bits has a total of 11 bits, including a start bit and a stop bit.
Figure 21-5. UART Data Formats
Table 21-1. Examples of 8-Bit Data Format
Start Bit
Data Bits
Address Bits
Parity Bits
Stop Bit
1
8
0
0
1
1
7
0
1
1
1
7
1
0
1
Note:
The address bit identifies the frame as an address character. The address bit is bit 7 (M = 0) or bit 8 (M = 1) See
Section 21.2.7, Receiver Wake-Up.
Table 21-2. Example of 9-Bit Data Format
Start Bit
Data Bits
Address Bits
Parity Bits
Stop Bit
1
9
0
0
1
1
8
0
1
1
1
8
1
0
1
Note:
The address bit identifies the frame as an address character. The address bit is bit 7 (M = 0) or bit 8 (M = 1). See
Section 21.2.7, Receiver Wake-Up.
Bit 5
Start
Bit
Bit 0
Bit 1
Next
Stop
Bit
Start
Bit
9-Bit Data Format
Bit 2
Bit 3
Bit 4
Bit 6
Bit 7
Parity
or Data
Bit
Parity
or Data
Bit
Bit M in SCICR Set
8-Bit Data Format
Bit M in SCICR Clear
Bit 5
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 6
Bit 7
Bit 8
Stop
Bit
Next
Start
Bit
Start
Bit
Содержание MSC8113
Страница 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
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Страница 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Страница 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Страница 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Страница 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Страница 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Страница 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Страница 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Страница 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Страница 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Страница 544: ...MSC8113 Reference Manual Rev 0 16 46 Freescale Semiconductor Direct Memory Access DMA Controller ...
Страница 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Страница 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Страница 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Страница 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Страница 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Страница 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Страница 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Страница 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...