IBM EM78P809N manual Uart Universal Asynchronous Receiver/Transmitter, Registers for Uart Circuit

EM78P809N

8-Bit Microcontroller

4.7 UART (Universal Asynchronous Receiver/Transmitter)

Registers for UART Circuit

R_BANK Address NAME Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1

Bit 0

BANK 2	0X05	URC1	URTD8	UMODE1	UMODE0	BRATE2	BRATE1	BRATE0	UTBE	TXE
			R/W	R/W	R/W	R/W	R/W	R/W	R	R/W
BANK 2	0X06	URC2	0	0	SBIM1	SBIM0	UINVEN	0	0	0
			--	--	R/W	R/W	R/W	--	--	--
BANK 2	0X07	URS	URRD8	EVEN	PRE	PRERR	OVERR	FMERR	URBF	RXE
			R/W	R/W	R/W	R/W	R/W	R/W	R	R/W
BANK 2	0X08	URRD	URRD7	URRD6	URRD5	URRD4	URRD3	URRD2	URRD1	URRD0
			R	R	R	R	R	R	R	R
BANK 2	0X09	URTD	URTD 7	URTD 6	URTD 5	URTD 4	URTD 3	URTD 2	URTD 1	URTD0
			W	W	W	W	W	W	W	W
BANK 0	0x0F	ISFR2	0	UERRIF	RBFF	TBEF	TBIF	EXIF1	0	TCIF0
			--	R/W	R/W	R/W	R/W	R/W	--	R/W
SFR	0x0F	IMR2	0	UERRIE	URIE	UTIE	TBIE	EXIE1	0	TCIE0
			--	R/W	R/W	R/W	R/W	R/W	--	R/W

TC4
Fsystem	Selector	Baud rate
		generator
RXE	RX Control		Interrupt
			Control
RX
RX shift register			Parity control
UINVEN URRD8	URRD		Error flag
			Data Bus

TX Control TXE

TX

URTD8 URTD

UINVEN

Fig. 11. Function Block Diagram

Product Specification (V1.0) 07.26.2005 • 33

(This specification is subject to change without further notice)