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203
CHAPTER 9 I/O PORT
9.10
Sample I/O Port Program
This section provides a sample program using I/O port pins.
■
Sample I/O Port Program
●
Processing specifications
•
Ports 0 and 1 are used to turn on all segments of a seven-segment (eight-segment if the decimal point is
included) LED.
•
Pin P00 corresponds to the anode common pin of the LED and pins P10 to P17 correspond to the
segment pins.
Figure 9.10-1 is an example of connecting the eight-segment LED to the MB90460/465 series ports.
Figure 9.10-1 Example of Eight-segment LED Connection
●
Coding example
PDR
EQU 000000H
PDR1
EQU 000001H
DDR0
EQU 000010H
DDR1
EQU 000011H
;-----------------------------Main program----------------------------------------------------------------------------------
CODE CSEG
START:
; Initialization
MOV I :PDR0, #00000000B ; Puts P00 at a low level (#XXXXXXX0B)
MOV I:DDR0, #11111111B ; Puts all port 0 bits in output mode
MOV I:PDR1, #11111111B ; Sets all port 1 bits to "1"
MOV I:DDR1, #11111111B ; Puts all port 1 bits in output mode
CODE ENDS
;--------------------------------------------------------------------------------------------------------------------------------
END START
MB90460/465 series
P00
P17
P16
P15
P14
P13
P12
P11
P10
Содержание MB90460 Series
Страница 1: ...The following document contains information on Cypress products ...
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Страница 9: ...iv ...
Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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