Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet
Product codes
AT91SAM9X25-EK
839
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
39.8 Universal Synchronous Asynchronous Receiver Transmitter (USART) User Interface
Notes: 1. Write is possible only in LIN Master node configuration.
Table 39-16. Register Mapping
Offset
Register
Name
Access Reset
0x0000
Control Register
US_CR
Write-only
–
0x0004
Mode Register
US_MR
Read-write
–
0x0008
Interrupt Enable Register
US_IER
Write-only
–
0x000C
Interrupt Disable Register
US_IDR
Write-only
–
0x0010
Interrupt Mask Register
US_IMR
Read-only
0x0
0x0014
Channel Status Register
US_CSR
Read-only
–
0x0018
Receiver Holding Register
US_RHR
Read-only
0x0
0x001C
Transmitter Holding Register
US_THR
Write-only
–
0x0020
Baud Rate Generator Register
US_BRGR
Read-write
0x0
0x0024
Receiver Time-out Register
US_RTOR
Read-write
0x0
0x0028
Transmitter Timeguard Register
US_TTGR
Read-write
0x0
0x2C - 0x3C
Reserved
–
–
–
0x0040
FI DI Ratio Register
US_FIDI
Read-write
0x174
0x0044
Number of Errors Register
US_NER
Read-only
–
0x0048
Reserved
–
–
–
0x004C
IrDA Filter Register
US_IF
Read-write
0x0
0x0050
Manchester Encoder Decoder Register
US_MAN
Read-write
0xB0011004
0x0054
LIN Mode Register
US_LINMR
Read-write
0x0
0x0058
LIN Identifier Register
US_LINIR
Read-write
0x0
0x005C
LIN Baud Rate Register
US_LINBRR
Read-only
0x0
0xE4
Write Protect Mode Register
US_WPMR
Read-write
0x0
0xE8
Write Protect Status Register
US_WPSR
Read-only
0x0
0x5C - 0xFC
Reserved
–
–
–