UART Address Map

Module Instance Base Address End Address
i_uart_0_uart_address_block 0xFFC02000 0xFFC020FF
i_uart_1_uart_address_block 0xFFC02100 0xFFC021FF
Register Offset Width Access Reset Value Description
rbr_thr_dll 0x0 32 RW 0x00000000 
Rx Buffer, Tx Holding, and Divisor Latch Low
ier_dlh 0x4 32 RW 0x00000000 
Interrupt Enable and Divisor Latch High
iir 0x8 32 RO 0x00000001 
Interrupt Identification Register
fcr 0x8 32 WO 0x00000000 
FIFO Control Register
lcr 0xC 32 RW 0x00000000 
Line Control Register
mcr 0x10 32 RW 0x00000000 
Modem Control Register
lsr 0x14 32 RO 0x00000060 
Line Status Register
msr 0x18 32 RO 0x00000000 
Modem Status Register
It should be noted that whenever bits 0, 1, 2 or 3 is set to logic one, to indicate
a change on the modem control inputs, a modem status interrupt will be generated
if enabled via the IER regardless of when the change occurred. Since the delta bits
(bits 0, 1, 3) can get set after a reset if their respective modem signals are
active (see individual bits for details), a read of the MSR after reset can be
performed to prevent unwanted interrupts.
scr 0x1C 32 RW 0x00000000 
Scratchpad Register
srbr_sthr_0 0x30 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_1 0x34 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_2 0x38 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_3 0x3C 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_4 0x40 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_5 0x44 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_6 0x48 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_7 0x4C 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_8 0x50 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_9 0x54 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_10 0x58 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_11 0x5C 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_12 0x60 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_13 0x64 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_14 0x68 32 RW 0x00000000 
Shadow RBR and THR
srbr_sthr_15 0x6C 32 RW 0x00000000 
Shadow RBR and THR
far 0x70 32 RW 0x00000000 
FIFO Access Register
tfr 0x74 32 RO 0x00000000 
Transmit FIFO Read
rfw 0x78 32 RW 0x00000000 
Receive FIFO Write
usr 0x7C 32 RO 0x00000006 
UART Status register.
tfl 0x80 32 RO 0x00000000 


                  		

               


               

                  
                     
                        rfl
                     
                  

                  
                     0x84
                  

                  
                     32
                  

                  
                     RO
                  

                  
                     0x00000000
                  

                  
                     
Receive FIFO Level.


                  		

               


               

                  
                     
                        srr
                     
                  

                  
                     0x88
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Software Reset Register.


                  		

               


               

                  
                     
                        srts
                     
                  

                  
                     0x8C
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow Request to Send.


                  		

               


               

                  
                     
                        sbcr
                     
                  

                  
                     0x90
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow Break Control Register.


                  		

               


               

                  
                     
                        sdmam
                     
                  

                  
                     0x94
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow DMA Mode.


                  		

               


               

                  
                     
                        sfe
                     
                  

                  
                     0x98
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow FIFO Enable


                  		

               


               

                  
                     
                        srt
                     
                  

                  
                     0x9C
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow RCVR Trigger


                  		

               


               

                  
                     
                        stet
                     
                  

                  
                     0xA0
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Shadow TX Empty Trigger


                  		

               


               

                  
                     
                        htx
                     
                  

                  
                     0xA4
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
Halt TX


                  		

               


               

                  
                     
                        dmasa
                     
                  

                  
                     0xA8
                  

                  
                     32
                  

                  
                     RW
                  

                  
                     0x00000000
                  

                  
                     
DMA Software Acknowledge


                  		

               


               

                  
                     
                        cpr
                     
                  

                  
                     0xF4
                  

                  
                     32
                  

                  
                     RO
                  

                  
                     0x00083F32
                  

                  
                     
Component Parameter Register


                  		

               


               

                  
                     
                        ucv
                     
                  

                  
                     0xF8
                  

                  
                     32
                  

                  
                     RO
                  

                  
                     0x3331342A
                  

                  
                     
Component Version


                  		

               


               

                  
                     
                        ctr
                     
                  

                  
                     0xFC
                  

                  
                     32
                  

                  
                     RO
                  

                  
                     0x44570110
                  

                  
                     
Component Type Register