; name: ISP_INI
; function: setup the UART and  open break detect,A break is detected 
;           when 11 consecutive bits are sensed low. The break detect
;           can be used to reset the device and force the device into 
;           ISP mode.
;           
; parameter: null
; note: The Boot Vector set is 01EH or user isp program
ISP_INI:	
		ANL	SSTAT,#0FAH		; clr the BR, it is SSTAT.2
		MOV	BRGCON,#00H		

		ORL	AUXR1,#40H		; setb the EBRR
		MOV	SCON,#50H		; setup UART mode 1, enables serial reception.
		MOV	BRGR1,#90H	
		MOV	BRGR0,#00H
		MOV	BRGCON,#03H		; Baud Rate Generator Enable.
		RET