em78p809n ELAN Microelectronics Corp, em78p809n Datasheet - Page 37

• Manufacturer Part Number: em78p809n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 07.26.2005
(This specification is subject to change without further notice)
4.7 UART (Universal Asynchronous Receiver/Transmitter)
Registers for UART Circuit
R_BANK Address NAME
BANK 2
BANK 2
BANK 2
BANK 2
BANK 2
BANK 0
SFR
RX
0X05
0X06
0X07
0X08
0X09
0x0F
0x0F
UINVEN
Fsystem
URRD URRD7 URRD6
ISFR2
URC1
URC2
URTD URTD 7 URTD 6
IMR2
RXE
URS
URRD8
RX shift register
TC4
URRD8
URTD8 UMODE1 UMODE0 BRATE2 BRATE1 BRATE0 UTBE
Bit 7
R/W
R/W
URRD
RX Control
W
--
R
--
--
0
0
0
Fig. 11. Function Block Diagram
UERRIF
UERRIE
EVEN
Bit 6
Baud rate
generator
R/W
R/W
R/W
R/W
W
R
0
--
Parity control
Data Bus
Error flag
Interrupt
URTD 5 URTD 4 URTD 3 URTD 2 URTD 1 URTD0
URRD5
Control
SBIM1
RBFF
Bit 5
URIE
R/W
R/W
PRE
R/W
R/W
R/W
W
R
PRERR OVERR FMERR URBF
URRD4 URRD3 URRD2 URRD1 URRD0
SBIM0 UINVEN
TBEF
Bit 4
UTIE
R/W
R/W
R/W
R/W
R/W
W
URTD8
R
TX Control
Bit 3
TBIF
TBIE
R/W
R/W
R/W
R/W
R/W
W
R
URTD
8-Bit Microcontroller
TXE
EXIF1
EXIE1
Bit 2
R/W
R/W
R/W
R/W
W
R
--
0
EM78P809N
Bit 1
UINVEN
W
R
--
R
R
--
--
0
0
0
TCIE0
TCIF0
Bit 0
R/W
RXE
R/W
R/W
R/W
TXE
TX
W
R
0
--
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