DS1822-PAR_07 DALLAS [Dallas Semiconductor], DS1822-PAR_07 Datasheet - Page 12

• Manufacturer Part Number: DS1822-PAR_07
• Description: Econo 1-Wire Parasite-Power Digital Thermometer
• Manufacturer: DALLAS [Dallas Semiconductor]

DS1822-PAR FUNCTION COMMANDS FLOW CHART Figure 10
MASTER T
COMMAND
FUNCTION
N
X
RECALL FROM E
MASTER BEGINS DATA
BUSY RECALLING
RECALL E
MASTER
DEVICE
R
Y
DATA
B8h
X
?
?
“0s”
Y
2
2
PROM
STRONG PULLUP ON DQ
DS1822-PAR CONVERTS
MASTER DISABLES
MASTER ENABLES
STRONG PULLUP
TEMPERATURE
TEMPERATURE
N
CONVERT
MASTER
R
44h
X
?
“1s”
Y
SEQUENCE (FIGURE 9) FOR
RETURN TO INITIALIZATION
NEXT TRANSACTION
N
12 of 19
N
MASTER R
N
MASTER R
FROM SCRATCHPAD
SCRATCHPAD
HAVE 8 BYTES
BEEN READ
CRC BYTE
T
MASTER
X
READ
X
RESET
BEh
X
SCRATCHPAD
?
?
?
DATA BYTE
Y
N
Y
Y
SCRATCHPAD TO EEPROM
STRONG PULL-UP ON DQ
DATA COPIED FROM
MASTER DISABLES
MASTER ENABLES
STRONG PULLUP
SCRATCHPAD
COPY
48h
MASTER T
?
N
MASTER T
MASTER T
Y
TO SCRATCHPAD
TO SCRATCHPAD
TO SCRATCHPAD
SCRATCHPAD
WRITE
X
4Eh
CONFIG. BYTE
N
?
X
X
T
T
Y
H
L
BYTE
BYTE
DS1822-PAR