參數(shù)資料
型號(hào): DS2422S
英文描述: 1-Wire Temperature/Datalogger with 8kB Datalog Memory
中文描述: 1 - Wire溫度/數(shù)據(jù)記錄器與8kB的數(shù)據(jù)記錄存儲(chǔ)器
文件頁(yè)數(shù): 47/48頁(yè)
文件大小: 444K
代理商: DS2422S
DS2422
47 of 48
STEP 2
During the setup, the device needs to learn the following information:
Time and Date
Sample Rate
Alarm Thresholds
Alarm Controls (Response to Conditional Search)
General Mission Parameters (e. g., channels to log and logging format, rollover, start mode)
Mission Start Delay
The following data will setup the DS2422 for a mission that logs temperature using 8-bit format. Such a mission
could last up to 56 days until the 8192-byte datalog memory is full.
ADDRESS
0200h
0201h
0202h
0203h
0204h
0205h
0206h
0207h
0208h
0209h
020Ah
020Bh
020Ch
020Dh
020Eh
020Fh
0210h
0211h
DATA
00h
30h
15h
01h
04h
02h
0Ah
00h
52h
66h
00h
FFh
FFh
FFh
FFh
FFh
02h
FCh
EXAMPLE VALUES
FUNCTION
15:30:00 hours
Time
1
st
of April in 2002
Date
Every 10 minutes (EHSS = 0)
Sample rate
0°C low
10°C high
Temperature Alarm
Threshold
External Data Alarm
Threshold
(Don’t care)
(Don’t care)
Clock through read-only registers
Enable high alarm
Disabled
Temp. Alarm Control
Data Alarm Control
RTC Oscillator Control, sample
rate selection
General Mission Control
Clock through
read-only registers
0212h
01h
On (enabled), EHSS = 0 (low sample rate)
0213h
0214h
0215h
0216h
0217h
0218h
C1h
FFh
FFh
5Ah
00h
00h
Normal start; no rollover; 8-bit temp. log
(Don’t care)
90 minutes
Mission Start Delay
With only a single DS2422 connected to the bus master, the communication of step 2 looks like this:
MASTER MODE
TX
RX
TX
TX
TX
TX
TX
DATA (LSB FIRST)
(Reset)
(Presence)
CCh
0Fh
00h
02h
<25 data bytes>
COMMENTS
Reset pulse
Presence pulse
Issue “skip ROM” command
Issue “write scratchpad” command
TA1, beginning offset=00h
TA2, address=0200h
Write 25 bytes of data to scratchpad
相關(guān)PDF資料
PDF描述
DS2482-800 Eight-Channel 1-Wire Master
DS2482-100 Single-Channel 1-Wire Master
DS2482S-100 Single-Channel 1-Wire Master
DS2482S-800 Eight-Channel 1-Wire Master
DS2502-E48 48-Bit Node Address Chip
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