AT91M40400 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT91M40400' PDF : 116 Pages View PDF
USART User Interface
Base Address USART0:
Base Address USART1:
0xFFFD0000
0xFFFCC000
Table 9. USART Memory Map
Offset
Register
0x00
Control Register
0x04
Mode Register
0x08
Interrupt Enable Register
0x0C
Interrupt Disable Register
0x10
Interrupt Mask Register
0x14
Channel Status Register
0x18
Receiver Holding Register
0x1C
Transmitter Holding Register
0x20
Baud Rate Generator Register
0x24
Receiver Time-out Register
0x28
Transmitter Time-guard Register
0x2C
Reserved
0x30
Receive Pointer Register
0x34
Receive Counter Register
0x38
Transmit Pointer Register
0x3C
Transmit Counter Register
AT91M40400
Name
US_CR
US_MR
US_IER
US_IDR
US_IMR
US_CSR
US_RHR
US_THR
US_BRGR
US_RTOR
US_TTGR
–
US_RPR
US_RCR
US_TPR
US_TCR
Access
Write only
Read/Write
Write only
Write only
Read only
Read only
Read only
Write only
Read/Write
Read/Write
Read/Write
–
Read/Write
Read/Write
Read/Write
Read/Write
Reset State
–
0
–
–
0
0x18
0
–
0
0
0
–
0
0
0
0
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