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AT91 Datasheet(PDF) 107 Page - ATMEL Corporation

Part # AT91
Description  ARM® Thumb® Microcontrollers
PDF  153 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT91 Datasheet(HTML) 107 Page - ATMEL Corporation

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107
AT91X40 Series
1354D–ATARM–08/02
USART User Interface
Base Address USART0: 0xFFFD0000 (Code Label USART0_BASE)
Base Address USART1: 0xFFFCC000 (Code Label USART1_BASE)
Table 15. USART Memory Map
Offset
Register
Name
Access
Reset State
0x00
Control Register
US_CR
Write Only
–
0x04
Mode Register
US_MR
Read/Write
0
0x08
Interrupt Enable Register
US_IER
Write Only
–
0x0C
Interrupt Disable Register
US_IDR
Write Only
–
0x10
Interrupt Mask Register
US_IMR
Read Only
0
0x14
Channel Status Register
US_CSR
Read Only
0x18
0x18
Receiver Holding Register
US_RHR
Read Only
0
0x1C
Transmitter Holding Register
US_THR
Write Only
–
0x20
Baud Rate Generator Register
US_BRGR
Read/Write
0
0x24
Receiver Time-out Register
US_RTOR
Read/Write
0
0x28
Transmitter Time-guard Register
US_TTGR
Read/Write
0
0x2C
Reserved
–
–
–
0x30
Receive Pointer Register
US_RPR
Read/Write
0
0x34
Receive Counter Register
US_RCR
Read/Write
0
0x38
Transmit Pointer Register
US_TPR
Read/Write
0
0x3C
Transmit Counter Register
US_TCR
Read/Write
0



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