參數(shù)資料
型號: LTC1198-2BC
廠商: Linear Technology Corporation
英文描述: 8-Bit, SO-8, 1MSPS ADCs with Auto-Shutdown Options
中文描述: 8位,SO - 8封裝,帶自動1MSPS ADC的關(guān)斷選項(xiàng)
文件頁數(shù): 26/28頁
文件大?。?/td> 452K
代理商: LTC1198-2BC
26
LTC1196/LTC1198
U
S
A
O
PPLICATI
TYPICAL
Once RINT is generated the code begins execution at the
label RINT. This code stores the D
OUT
word from the
LTC1198 in the ACC and then stores it in location 200 hex.
The data appears in location 200 hex right-justified as
shown in Figure 19. The code is set up to continually loop,
so at this point the code jumps to label TXRX and repeats
from here.
L1196/98 F19
MSB
LSB
X X X X X X X X 7 6 5 4 3 2 1 0
D
OUT
FROM LTC1198 STORED IN TMS320C25 RAM
> 200
Figure 19. Memory Map for the Circuit in Figure 15
LABEL
MNEMONIC
AORG
B
COMMENTS
ON RESET CODE EXECUTION STARTS AT 0
BRANCH TO INITIALIZATION ROUTINE
0
INIT
AORG
B
>26
RINT
ADDRESS OF RINT INTERRUPT VECTOR
BRANCH TO RINT SERVICE ROUTINE
AORG
DINT
LDPK
LARP
LRLK
LACK
SACL
STXM
FORT
>32
MAIN PROGRAM STARTS HERE
DISABLE INTERRUPTS
SET DATA MEMORY PAGE POINTER TO 0
SET AUXILIARY REGISTER POINTER TO 1
SET AUXILIARY REGISTER 1 TO >200
LOAD IMR CONFIG WORD INTO ACC
STORE IMR CONFIG WORD INTO IMR
CONFIGURE FSX AS AN OUTPUT
SET SERIAL PORT TO 16-BIT MODE
INIT
>0
>1
AR1,>200
>10
>4
0
TXRX
LACK
SFSM
RPTK
SFL
SACL
EINT
>44
LOAD LTC1198 D
IN
WORD INTO ACC
FSX PULSES GENERATED ON XSR LOAD
REPEAT NEXT INSTRUCTION 8 TIMES
SHIFTS D
IN
WORD TO RIGHT POSITION
PUT D
IN
WORD IN TRANSMIT REGISTER
ENABLE INTERRUPT (DISABLED ON RINT)
7
>1
RPTK
NOP
2
MINIMIZE THE CONVERSION CYCLE TIME
TO BE 20 CLOCK CYCLES
RINT
ZALS
SACL
B
END
>0
*, 0
TXRX
STORE LTC1198 DOUT WORD IN ACC
STORE ACC IN LOCATION >200
BRANCH TO TRANSMIT RECEIVE ROUTINE
Figure 20. TMS320C25 Code for the Circuit in Figure 15
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