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Question 4 (a) An 8051 microcontroller is equipped with an on-chip serial port for communication with external devices using UART. i.Draw a block diagram to describe the hardware connection to make the RS232 compatible with the 8051 microcontroller. Briefly explain your block diagram. [2 marks] ii.Complete an instruction sequence in Figure Q4(a) to initialize the on-chip serial port to Mode 1 with baud rate of 19200 (with SMOD = 1) to transmit a character \"H\" serially and continuously. Use Timer 1 in Mode 2 with an oscillator frequency of 11.0592 MHz. [5 marks] ; Mode of serial port: ; 19200 Baud Rate, TH1 = ____(show calculation) ORG 0000H ORL PCON, _ MOV SCON, _ MOV TMOD, _ MOV _ SETB _ AGAIN: MOV _, #\"H\" HERE: JNB TI, ___ CLR TI SJMP AGAIN ;SMOD = 1 DOUBLE BAUD RATE ; ; 19200 BAUD Figure Q4(a) MSI/HAK ECE2216 MICROCONTROLLER AND MICROPROCESSOR SYSTEMS 23 OCTOBER 2020 iii. Write a subroutine called \"Msg_sent\" to transmit the string \"Yes\" serially via [5 marks] UART.

          Question 4
(a) An 8051 microcontroller is equipped with an on-chip serial port for communication
with external devices using UART.
i.Draw a block diagram to describe the hardware connection to make the RS232
compatible with the 8051 microcontroller. Briefly explain your block diagram.
[2 marks]
ii.Complete an instruction sequence in Figure Q4(a) to initialize the on-chip serial
port to Mode 1 with baud rate of 19200 (with SMOD = 1) to transmit a character
\"H\" serially and continuously. Use Timer 1 in Mode 2 with an oscillator frequency
of 11.0592 MHz.
[5 marks]
; Mode of serial port:
; 19200 Baud Rate, TH1 = ______(show calculation)
ORG 0000H
ORL PCON, _____
MOV SCON, _____
MOV TMOD, _____
MOV _____
SETB _____
AGAIN: MOV _____, #\"H\"
HERE: JNB TI, _____
CLR TI
SJMP AGAIN
;SMOD = 1 DOUBLE BAUD RATE
;
; 19200 BAUD
Figure Q4(a)
MSI/HAK
ECE2216
MICROCONTROLLER AND MICROPROCESSOR SYSTEMS 23 OCTOBER 2020
iii. Write a subroutine called \"Msg_sent\" to transmit the string \"Yes\" serially via
[5 marks]
UART.

Question 4
(a) An 8051 microcontroller is equipped with an on-chip serial port for communication
with external devices using UART.
i.Draw a block diagram to describe the hardware connection to make the RS232
compatible with the 8051 microcontroller. Briefly explain your block diagram.
[2 marks]
ii.Complete an instruction sequence in Figure Q4(a) to initialize the on-chip serial
port to Mode 1 with baud rate of 19200 (with SMOD = 1) to transmit a character
Ḧs̈erially and continuously. Use Timer 1 in Mode 2 with an oscillator frequency
of 11.0592 MHz.
[5 marks]
; Mode of serial port:
; 19200 Baud Rate, TH1 = (show calculation)
ORG 0000H
ORL PCON,
MOV SCON,
MOV TMOD,
MOV
SETB
AGAIN: MOV , #ḦḦERE: JNB TI,
CLR TI
SJMP AGAIN
;SMOD = 1 DOUBLE BAUD RATE
;
; 19200 BAUD
Figure Q4(a)
MSI/HAK
ECE2216
MICROCONTROLLER AND MICROPROCESSOR SYSTEMS 23 OCTOBER 2020
iii. Write a subroutine called M̈sgsentẗo transmit the string Ÿess̈erially via
[5 marks]
UART.

Added by Justin W.

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