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參數(shù)資料
| 型號： | EVAL-ADM1023 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Evaluation Board for Microprocessor System Temperature Monitor |
| 中文描述： | 評估板的微機(jī)監(jiān)控系統(tǒng)的溫度 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 292K |
| 代理商： | EVAL-ADM1023 |
EVAL-ADM1023
–4–
REV. A
Prelimnary Technical Data
DATA
TECHNCAL
C ONNE C T OR S, SWIT C H E S A ND IND IC A T OR S
T he function of the various connectors, links and
indicators on the evaluation board are explained below.
T E ST C ONNE C T OR
T est Connector J1 allows an external diode to be
connected between the D+ and D- terminals of the
AD M 1023
C E NT R ONIC S INT E R F A C E C A B L E
T he evaluation board and the personal computer may be
connected via the printer parallel port using the contronics
cable provided. T he connections to J2 are as follows.
RE MOT E SE NSOR SE L E C T L K 1
T he function of this jumper is to allow the user to choose
between measuring tempertature using the on-board
remote sensor and an external one connected between the
D+ and D- terminals of J1. When the middle pin is linked
to B the on-board sensor is used and when the middle pin
is linked to A the off-board sensor is used.
ST AND BY INPUT L K 4
T he ADM1023 has an active low standby input, pin 15
controlled by LK 4 on the evaluation board. T his is a logic
input that enables selection between normal operation
(high) and standby operation (low). Without the shorting
link the pin is high (normal mode). With the shorting link
the pin is low (standby mode). T his input performs the
same function as bit 7 of the status register
T ABL E 1. ADM1023 SE NSOR SE L E C T ION
LK1 Position Sensor Selected
A
External Sensor
B
On-baord NPN Sensor
SE R IAL BUS AD D R E SS SE L E C T
LK 2 and LK 3 are used to set the two LSB’s of the
ADM1023’s serial bus address, ADD0 and ADD1. T hese
pins are tri-state and can be grounded, left unconnected or
tied to V
DD
. T his means a total of nine addresses are
possible. However for simplicity on the evaluation board a
jumper is used to allow each pin two states ( 4 Addresses).
T he pin is floating when the shorting link is not on the
board. T he pin is grounded when the shorting link is
placed on the board. It should be noted that ADD0 and
ADD1 are only read at power up. If LK 2 or LK 3 are
changed while the ADM1023 is on, the change of address
will not be effective until the device has been powered off
and then on again.
As the serial bus address is seven bits, when storing it as
an 8-bit word it must be left or right justified, with either
the MSB or the LSB of the 8-bit word as zero. T he
ADM1023 evaluation software stores the 7-bit serial bus
address as left justified and makes the LSB zero. T able 2
shows the four possible addresses possible on the
evaluation board
T ABL E 2. ADM1023 DE VIC E ADDRE SSE S
Address Pins
ADD1 (LK2) ADD0 (LK3) Binary Hex
Device Address
0(LK 2 Closed) 0(LK 3 Closed) 0011000(0) 0
0(L K C losed)
NC(LK Open) 0011001(0) 32
NC(LK 2 Open) 0(LK 3 Closed) 0101001(0) 52
NC(LK 2 Open) NC(LK 3 Open) 0101010(0) 54
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