LTC1294 LINER [Linear Technology], LTC1294 Datasheet - Page 16

• Manufacturer Part Number: LTC1294
• Description: Single Chip 12-Bit Data Acquisition System
• Manufacturer: LINER [Linear Technology]

A
LTC1293/LTC1294/LTC1296
MC68HC11 CODE
LABEL MNEMONIC OPERAND COMMENTS
LOOP BCLR
WAIT1 BPL
16
PPLICATI
(D
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDAA
STAA
LDX
LDAA
STAA
LDAA
LDAA
IN
/D
DATA
OUT
CLK
CS
R2
R3
)
MSB
B11
B3
O
#$50
$1028
#$1B
$1009
#$10
$50
#$E0
$51
#$00
$52
#$1000
$08,X,$01 D0 GOES LOW (CS GOES LOW)
$50
$102A
$1029
WAIT1
$51
D OUT FROM LTC1294 STORED IN 8051 RAM
START
B10
U
B2
1
SGL/
S
DIFF
B9
B1
2
I FOR ATIO
CONFIGURATION DATA FOR SPCR
LOAD DATA INTO SPCR ($1028)
CONFIG. DATA FOR PORT D DDR
LOAD DATA INTO PORT D DDR
LOAD DIN WORD INTO ACC A
LOAD DIN DATA INTO $50
LOAD DIN WORD INTO ACC A
LOAD DIN DATA INTO $51
LOAD DUMMY DIN WORD INTO ACC A
LOAD DUMMY DIN DATA INTO $52
LOAD INDEX REGISTER X WITH $1000
LOAD DIN INTO ACC A FROM $50
LOAD DIN INTO SPI, START SCK
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
LOAD DIN INTO ACC A FROM $51
U
ODD/
SIGN
8051 P1.2 OUTPUT DATA
LSB
CLK BEFORE THE 8TH FALLING CLK
B8
B0
AS INPUT AFTER THE 8TH RISING
3
SEL
TO LTC1294
1
B7
8051 P1.2 RECONFIGURED
0
4
W
SEL
Hardware and Software Interface to Intel 8051
Hardware and Software Interface to Intel 8051
B6
0
0
5
UNI
B5
0
6
U
B4
MSB
0
7
PS
ANALOG
PS BIT LATCHED
INTO LTC1294
INPUTS
8
LABEL MNEMONIC OPERAND COMMENTS
WAIT2 LDAA
WAIT3 LDAA
B11
LTC1294 TAKES CONTROL OF DATA
LINE ON 8TH FALLING CLK
B10
STAA
BPL
LDAA
STAA
LDAA
STAA
BPL
BSET
LDAA
STAA
JMP
LTC1294 SEND A/D RESULT
B9
LTC1294
BACK TO 8051 P1.2
B8
B7
D
CLK
OUT
D
$102A
$1029
WAIT2
$102A
$62
$52
$102A
$1029
WAIT3
$08,X,$01 D0 GOES HIGH (CS GOES HIGH)
$102A
$63
LOOP
B6
CS
IN
B5
MUX ADDRESS
A/D RESULT
B4
B3
LOAD DIN INTO SPI, START SCK
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
LOAD LTC1294 MSBs INTO ACC A
STORE MSBs IN $62
LOAD DUMMY DIN INTO ACC A FROM
$52
LOAD DUMMY DIN INTO SPI, START
SCK
CHECK SPI STATUS REG
CHECK IF TRANSFER IS DONE
LOAD LTC1294 LSBs IN ACC
STORE LSBs IN $63
START NEXT CONVERSION
B2
B1
P1.3
P1.2
P1.4
B0
8051
LTC1293 TD02
LTC1293 TD02a