28. Register Summary
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
(0xFF)
(0xFE)
(0xFD)
(0xFC)
(0xFB)
(0xFA)
(0xF9)
(0xF8)
(0xF7)
(0xF6)
(0xF5)
(0xF4)
(0xF3)
(0xF2)
(0xF1)
(0xF0)
(0xEF)
(0xEE)
(0xED)
(0xEC)
(0xEB)
(0xEA)
(0xE9)
(0xE8)
(0xE7)
(0xE6)
(0xE5)
(0xE4)
(0xE3)
(0xE2)
(0xE1)
(0xE0)
(0xDF)
(0xDE)
(0xDD)
(0xDC)
(0xDB)
(0xDA)
(0xD9)
(0xD8)
(0xD7)
(0xD6)
(0xD5)
(0xD4)
(0xD3)
(0xD2)
(0xD1)
(0xD0)
(0xCF)
(0xCE)
(0xCD)
(0xCC)
(0xCB)
(0xCA)
(0xC9)
(0xC8)
(0xC7)
(0xC6)
(0xC5)
(0xC4)
(0xC3)
(0xC2)
(0xC1)
(0xC0)
(0xBF)
Reserved
Reserved
Reserved
Reserved
UPOE
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
UPWE1
UPWE0
UPDRV1
UPDRV0
SCKI
DATAI
DPI
DMI
PS2CON
Reserved
Reserved
Reserved
Reserved
Reserved
UEINT
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PS2EN
-
-
-
-
-
-
-
-
-
-
EPINT4:0
-
Reserved
UEBCLX
UEDATX
UEIENX
-
-
-
-
-
BYCT7:0
DAT7:0
FLERRE
NAKINE
-
-
NAKOUTE
RXSTPE
-
RXOUTE
CTRLDIR
STALLEDE
TXINE
UESTA1X
UESTA0X
UECFG1X
UECFG0X
UECONX
UERST
-
-
-
-
CURRBK1:0
NBUSYBK1:0
ALLOC
CFGOK
-
OVERFI
UNDERFI
DTSEQ1:0
EPBK1:0
EPSIZE2:0
-
EPTYPE1:0
-
-
-
-
-
-
EPDIR
EPEN
-
-
STALLRQ
STALLRQC
RSTDT
-
-
-
-
EPRST4:0
UENUM
-
-
-
-
-
EPNUM2:0
UEINTX
FIFOCON
NAKINI
RWAL
NAKOUTI
RXSTPI
RXOUTI
STALLEDI
TXINI
Reserved
UDMFN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
FNCERR
-
-
UDFNUMH
UDFNUML
UDADDR
UDIEN
FNUM10:8
FNUM7:0
ADDEN
UADD6:0
-
UPRSME
EORSME
WAKEUPE
EORSTE
SOFE
-
SUSPE
UDINT
-
UPRSMI
EORSMI
WAKEUPI
EORSTI
SOFI
-
SUSPI
UDCON
-
-
-
-
-
RSTCPU
RMWKUP
DETACH
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
USBCON
Reserved
Reserved
Reserved
Reserved
Reserved
CLKSTA
CLKSEL1
CLKSEL0
Reserved
UDR1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
USBE
-
FRZCLK
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
EXTON
EXCKSEL0
CLKS
-
-
-
RCCKSEL2
RCSUT0
-
-
RCCKSEL1
EXSUT1
-
-
RCCKSEL0
EXSUT0
-
-
-
EXCKSEL2
EXTE
-
RCON
RCCKSEL3
RCSUT1
-
EXCKSEL3
EXCKSEL1
RCE
-
-
-
USART1 I/O Data Register
- USART1 Baud Rate Register High Byte
UBRR1H
UBRR1L
UCSR1D
UCSR1C
UCSR1B
UCSR1A
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
-
-
-
USART1 Baud Rate Register Low Byte
-
-
-
-
-
-
CTSEN
RTSEN
UMSEL11
UMSEL10
UPM11
UPM10
USBS1
UCSZ11
UCSZ10
UCPOL1
RXCIE1
TXCIE1
UDRIE1
RXEN1
TXEN1
UCSZ12
RXB81
TXB81
RXC1
TXC1
UDRE1
FE1
DOR1
PE1
U2X1
MPCM1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
288
AT90USB82/162
7707DS–AVR–07/08