DS2450 Dallas Semiconducotr, DS2450 Datasheet - Page 17

• Manufacturer Part Number: DS2450
• Description: 1-Wire Quad A/D Converter
• Manufacturer: Dallas Semiconducotr

USAGE EXAMPLE (set-up continued, conversion, read flags)
Continued on the next page.
*The status data byte includes the channel D alarm flags AFH and AFL which are used to control the
channel A and B outputs (see next page).
MASTER MODE
TX
RX
TX
TX
TX
TX
TX
RX
RX
TX
RX
RX
TX
RX
TX
TX
TX
TX
RX
RX
TX
RX
TX
TX
TX
TX
RX
RX
DATA (LSB FIRST)
<multiple data bytes>
<data byte>
<CRC16>
<CRC16>
<CRC16>
<CRC16>
Presence
Presence
Presence
Reset
Reset
Reset
CCh
CCh
CCh
3Ch
Aah
55h
16h
00h
64h
64h
96h
96h
08h
40h
0Fh
00h
17 of 24
COMMENTS
Reset Pulse (480 - 960 s)
Presence Pulse
Issue “Skip ROM” Command
Issue “Write Memory” Command
TA1, beginning address
TA2, address = 0016h
data byte (address 0016)
CRC of command, address, data byte
read-back for simple verification
next data byte (address 0017h)
CRC of address, data byte
read-back for simple verification
Reset Pulse (480 - 960 s)
Presence Pulse
Issue “Skip ROM” Command
Issue “Convert” Command
input select mask
read-out control byte
CRC of command, mask, control byte
continue reading until byte is FFh
Reset Pulse (480 - 960 s)
Presence Pulse
Issue “Skip ROM” Command
Issue “Read Memory” Command
TA1, beginning address
TA2, address = 000Fh
status data*
CRC of command, address, data byte
CH-D
CH-D
CH-D
102199
DS2450