48 MHz
14 bits divisor:
1/(DLH,DLL)
DLH
DLL
16x 13x divisor
MDR1[2:0]
MODE_SELECT field
UART MODE16x
UART MODE 13x
TX UART clock
RX UART clock
uart-032
Public Version
UART/IrDA/CIR Functional Description
www.ti.com
Table 19-29. CIR Mode Register Overview
(1) (2)
(continued)
Address
Registers
Offset
Configuration_Mode_A
Configuration_Mode_B
Operational_Mode
Read
Write
Read
Write
Read
Write
0x048
-
-
-
-
0x050
-
-
-
0x054
0x058
-
-
-
0x05C
[6:4]
[6:4]
0x060
0x064
RXFIFO_LVL_R RXFIFO_LVL_RE RXFIFO_LVL_REG
0x068
0x06C
0x070
0x080
19.4.4 Protocol Formatting
19.4.4.1 UART Mode
19.4.4.1.1 UART Clock Generation: Baud Rate Generation
The UART function contains a programmable baud generator and a set of fixed dividers that divide the
48-MHz clock input down to the expected baud rate.
shows the baud rate generator and associated controls.
Figure 19-31. Baud Rate Generation
CAUTION
It is mandatory that MODE_SELECT = DISABLE (UARTi.
[2:0] =
0x7)
before
initializing
or
modifying
clock
parameter
controls
, UARTi.
). Failure to observe this rule can result in
unpredictable module behavior.
19.4.4.1.2 Choosing the Appropriate Divisor Value
Two divisor values are:
2904
UART/IrDA/CIR
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
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