Functional Description
Table 19-21. UART Mode Selection
Value
Mode
0x0:
UART 16x mode
0x1:
SIR mode
0x2:
UART 16x auto-baud
0x3:
UART 13x mode
0x4:
MIR mode
0x5:
FIR mode
0x6:
CIR mode
MODESELECT is effective when the module is in operational mode (see
, Register
Access Modes).
19.3.7.2.1 Registers Available for the UART Function
Only the registers listed in
are used for the UART function.
Table 19-22. UART Mode Register Overview
(1) (2)
Address
Registers
Offset
Configuration Mode A
Configuration Mode B
Operational Mode
Read
Write
Read
Write
Read
Write
0x000
UART_DLL
UART_DLL
UART_DLL
UART_DLL
UART_RHR
UART_THR
0x004
UART_DLH
UART_DLH
UART_DLH
UART_DLH
UART_IER(UART)
UART_IER(UA
RT)
0x008
UART_IIR
UART_FCR
UART_EFR[4]
UART_EFR[4]
UART_IIR(UART)
UART_FCR(U
ART)
0x00C
UART_LCR
UART_LCR
UART_LCR
UART_LCR
UART_LCR
UART_LCR
0x010
UART_MCR
UART_MCR
UART_XON1_ADD
UART_XON1_AD
UART_MCR
UART_MCR
R1
DR1
0x014
UART_LSR(UA –
UART_XON2_ADD
UART_XON2_AD
UART_LSR(UART) –
RT)
R2
DR2
0x018
UART_MSR/U
UART_TCR
UART_XOFF1/UAR
UART_XOFF1/U
UART_MSR/UART
UART_TCR
ART_TCR
T_TCR
ART_TCR
_TCR
0x01C
UART_TLR/UA UART_TLR/UA
UART_TLR/UART_
UART_TLR/UAR
UART_TLR/UART_ UART_TLR/UA
RT_SPR
RT_SPR
XOFF2
T_XOFF2
SPR
RT_SPR
0x020
UART_MDR1
UART_MDR1[2:
UART_MDR1[2:0]
UART_MDR1[2:0] UART_MDR1[2:0]
UART_MDR1[2
0]
:0]
0x024
UART_MDR2
UART_MDR2
UART_MDR2
UART_MDR2
UART_MDR2
UART_MDR2
0x028
–
–
–
–
–
–
0x02C
–
–
–
–
–
–
0x030
–
–
–
–
–
–
0x034
–
–
–
–
–
–
0x038
UART_UASR
–
UART_UASR
–
–
–
0x03C
–
–
–
–
–
–
0x040
UART_SCR
UART_SCR
UART_SCR
UART_SCR
UART_SCR
UART_SCR
0x044
UART_SSR
–
UART_SSR
–
UART_SSR
–
0x048
–
–
–
–
–
–
0x050
UART_MVR
–
UART_MVR
–
UART_MVR
–
0x054
UART_SYSC
UART_SYSC
UART_SYSC
UART_SYSC
UART_SYSC
UART_SYSC
0x058
UART_SYSS
–
UART_SYSS
–
UART_SYSS
–
(1)
REGISTER_NAME(UART) notation indicates that the register exists for other functions (IrDA or CIR), but fields have different
meanings for other functions.
(2)
REGISTER_NAME[m:n] notation indicates that only register bits numbered m to n apply to the UART function.
3470Universal Asynchronous Receiver/Transmitter (UART)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated