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PDF DS1615 Data sheet ( Hoja de datos )
| Número de pieza | DS1615 | |
| Descripción | Temperature Recorder | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS1615 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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FEATURES
Digital thermometer measures temperature
-40°C to +85°C in 0.5°C increments (-40°F
to +183.2°F in 0.9°F increments)
Digital thermometer provides ±2°C accuracy
Real Time Clock/Calendar in BCD format
counts seconds, minutes, hours, date, month,
day of the week, and year with leap year
compensation (Y2K compatible)
Automatically wakes up and measures
temperature at user-programmable intervals
from 1 to 255 minutes
Logs up to 2048 consecutive temperature
measurements in read-only nonvolatile
memory
Records long-term temperature histogram in
63 bins with 2.0°C resolution
Programmable temperature-high and
temperature-low alarm trip points
Two serial interface options: synchronous and
asynchronous
- 3-wire synchronous serial interface
- Asynchronous serial interface compatible
with standard UARTs
Memory partitioned into 32-byte pages for
packetizing data
On-chip 16-bit CRC generator to safeguard
data read operations in asynchronous
communications mode
Unique, factory lasered and tested 64-bit
serial number
DS1615
Temperature Recorder
PIN ASSIGNMENT
VBAT
X1
X2
NC
INSPEC
OUTSPEC
INT
GND
1
2
3
4
5
6
7
8
16 VCC
15 COMSEL
14 RX
13 TX
12 SCLK
11 I/O
10 RST
9 ST
DS1615 16-Pin DIP
DS1615S 16-Pin SOIC (300 mil)
Top View
BUMP 5
BUMP 1
BUMP 21
BUMP 17
DS1615X Flip Chip Package
Bottom View
PIN DESCRIPTION
Vbat - Battery Supply
X1 - Crystal Input
X2 - Crystal Output
NC - No Connect
INSPEC
- In-specification Output
OUTSPEC - Out-of-specification Output
INT
GND
- Interrupt Output
- Ground
ST - Start/Status Input
RST
I/O
SCLK
TX
RX
COMSEL
VCC
- 3-wire Reset Input
- 3-wire Input/Output
- 3-wire Clock Input
- Transmit Output
- Receive Input
- Communication Select
- +5V Supply
1 of 24
052400
1 page  
DS1615 MEMORY MAP Figure 2a
ADDRESS
0000H
TO 001FH
RTC AND CONTROL REGISTERS
0020H
TO 003FH
(RESERVED)
0040H
TO 005FH
USER NV RAM
0060H
TO 0217H
(RESERVED FOR FUTURE EXTENSIONS)
0218H
TO 021FH
00220H
TO 027FH
0280H
TO 07FFH
0800H
TO 087FH
0880H
TO 0FFFH
1000H
TO 17FFH
1800H
AND HIGHER
SERIAL NUMBER
ALARM TIME STAMPS AND DURATIONS
(RESERVED FOR FUTURE EXTENSIONS)
TEMPERATURE HISTOGRAM (63 BINS OF 2 BYTES EACH)
(RESERVED FOR FUTURE EXTENSIONS)
TEMPERATURE DATALOG MEMORY (64 PAGES)
(RESERVED FOR FUTURE EXTENSIONS)
DS1615
PAGE 0
PAGE 1
PAGE 2
PAGE 3
TO PAGE 16
(EXCLUDING LAST
8 BYTES OF
PAGE 16)
PAGE 16
(LAST 8 BYTES)
PAGE 17
TO PAGE 19
PAGES 20 - 63
PAGE 64
TO PAGE 67
PAGES 68 - 127
PAGE 128
TO PAGE 191
PAGE 192 AND
HIGHER
5 of 24
5 Page 
DS1615
starts a datalog mission or polls the device for information, one or both of these pins will be pulsed four
times. Depending on the status of the device, both pins will be pulsed simultaneously or just one pin will
be pulsed at a time. Each pulse is 62.5 ms in duration and will start every half second. See Figures 8 and
9 for further details.
The INSPEC and OUTSPEC pins are used to provide visual feedback to the end user in the following
situations:
1. Datalog Mission Start When a datalog mission is first initiated, the INSPEC and OUTSPEC pins will
generate four low pulses simultaneously to give the end user a visual indication that a datalog mission
has begun.
2. Request for Status of Data
Following a user request for the status of recorded temperature data, the INSPEC pin will generate four
low pulses if the recorded temperature data is within the user defined limits (as set in the Low
Temperature Threshold and High Temperature Threshold registers). If the recorded temperature data
contains any readings that fall outside of these thresholds, the OUTSPEC pin will be pulsed four times. If
the request comes after the mission has started (i.e., MIP = 1), but before the first temperature sample has
been recorded, the INSPEC and OUTSPEC pins will generate a total of four low pulses alternately, starting
with the OUTSPEC pin.
The DS1615 provides two methods for the user to request the status of the data. The first method is to
send the Specification Test command over the serial interface. The second method is by holding the ST
pin low for at least half a second after the datalogger has already been started.
CLOCK, CALENDAR, AND ALARM
The time and calendar information is accessed by reading/ writing the appropriate register bytes. Note
that some bits are set to zero. These bits will always read zero regardless of how they are written. The
contents of the time, calendar, and alarm registers are in the Binary-Coded Decimal (BCD) format.
The DS1615 can run in either 12-hour or 24-hour mode. Bit 6 of the hours register is defined as the 12-
or 24-hour mode select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5 is the
AM/PM bit with logic one being PM. In the 24-hour mode, bit 5 is the second 10-hour bit (20-23 hours).
The DS1615 also contains a time of day alarm. The alarm registers are located in registers 0007h to
000Ah. Bit 7 of each of the alarm registers are mask bits (see Table 2). When all of the mask bits are
logic 0, an alarm will occur once per week when the values stored in time-keeping registers 0000h to
0003h match the values stored in the time of day alarm registers. An alarm will be generated every day
when mask bit of the day alarm register is set to 1. An alarm will be generated every hour when the day
and hour alarm mask bits are set to 1. Similarly, an alarm will be generated every minute when the day,
hour, and minute alarm mask bits are set to 1. When day, hour, minute, and seconds alarm mask bits are
set to 1, an alarm will occur every second.
As a security measure to prevent unauthorized tampering, changing any value in the RTC and Control
registers (with the exception of the Status register) will stop a datalog mission and clear the Mission-in-
Progress (MIP) bit.
11 of 24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet DS1615.PDF ] | |
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