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參數(shù)資料
| 型號(hào)： | MC33298DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | OCTAL SERIAL SWITCH (SPI Input/Output) |
| 中文描述： | 1 A 8 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDSO24 |
| 封裝： | PLASTIC, SOP-24 |
| 文件頁(yè)數(shù)： | 20/24頁(yè) |
| 文件大?。?/td> | 280K |
| 代理商： | MC33298DW |
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MC33298
20
MOTOROLA ANALOG IC DEVICE DATA
Table 1. Program to Exercise the MC33298 Using SPI (Having Only SIOP) Protocol
SET LABELS FOR OUTPUT REGISTERS
PORTA
EQU
$0000
;SPI Port
;DO (Data Out), SCLK, CS, RESET, X, FLTOUT, DI (Data In)
PORTB
EQU
$0001
;Normally the SIOP Port. SIOP will be disabled
PORTC
EQU
$0002
;A–D Converter Port
PORTD
EQU
$0003
;Timer Capture Port
DDRA
EQU
$0004
;Data Direction Register for SPI Port
DDRB
EQU
$0005
;Data Direction Register for SCLK, SDI, SDO, 11111
DDRC
EQU
$0006
;Data Direction Register for A–D Converter Port
DDRD
EQU
$0007
;Data Direction Register for PORTD, Timer Capture
DTOUT
EQU
$0080
;Register for the SPI output data. This register will be used for a Serial–to–Parallel transformation.
DATAIN
EQU
$0081
;Input Register for SPI. Also used for a Serial–to–Parallel transformation.
VALUE
EQU
$0082
;Register to store the SPI. Also used for a Serial–to–Parallel transformation.
DATA1
EQU
$0083
;Miscellaneous data register
SCR
EQU
$000A
;Label for SIOP control register, 0 SPE 0 MSTR 0 0 0 0.
SSR
EQU
$000B
;Label for SIOP status register, SPIF DCOL 0 0 0 0 0 0, Read Only Register.
SDR
EQU
$000C
;Label for SIOP data register.
ORG
$0100
;Program starts at first byte of User ROM.
INIT
RSP
;Reset Stack Pointer to $FF.
INITIALIZE THE DATA REGISTERS AND THEIR DATA DIRECTION BIT REGISTERS
LDA
#$FE
;Configuration PortA as the SPI Port.
STA
DDRA
;All but Bit 0 will be outputs.
LDA
#$FF
STA
DDRB
;Configure Register B as an output. SIOP is not used for the MC33298, but is available for
another peripheral.
STA
DDRC
;Configure Register C as an output
STA
DDRD
;Configure Register D as an output
LDA
#%00010000
;Initialize the SIOP Control Register.
STA
SCR
;Disable SIOP by clearing Bit 6.
SELECT THE DESIRED OUTPUTS
TOP
LDA
STA
#$55
VALUE
Select outputs of MC33298 to be turned “on.” This instruction is left inside the loop to include
changes while running the program. A set bit will cause the associated MC33298 output to be
“off.” The value register is uncorrupted by the serial–to–parallel conversion.
BSET
4,PORTA
;Reset the MC33298.
BCLR
4,PORTA
;Also establishes a + or – trigger source
BSET
4,PORTA
;The MC33298 is reset with a logic low.
BCLR
5,PORTA
;Enable MC33298 by pulling CSB (chip select bar) low. Within the MC33298 the Fault Status is
transferred to the MC33298 Serial Register at a falling edge of CSB.
LDA
VALUE
;Select outputs to be turned “on.”
STA
DTOUT
;Save Output Word (Value) to check for fault.
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