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參數(shù)資料
| 型號(hào)： | EVAL-ADM1022 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Evaluation Board for Microprocessor System Temperature Monitor |
| 中文描述： | 評(píng)估板的微機(jī)監(jiān)控系統(tǒng)的溫度 |
| 文件頁(yè)數(shù)： | 4/14頁(yè) |
| 文件大?。?/td> | 346K |
| 代理商： | EVAL-ADM1022 |
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EVAL-ADM1022
–4–
REV. B
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, switches and indi-
cators on the evaluation board is explained below.
T E ST C ONNE C T OR J4
T est connector J4 allows the serial data and clock lines of
the ADM1022 and the
THERM
line to be monitored.
T he connector also allows access to the V
MON
and GPI
lines.
Alternative external diode sensors may be connected be-
tween the D1 and D2 pairs of inputs.
C E NT R ONIC S INT E R F A C E C ONNE C T OR J2
If the personal computer being used with the evaluation
board does not have a System Management Bus on the
motherboard, connection between the evaluation board
should be made via a parallel printer port, using the cable
provided. T he connections to J2 are as follows:
T ABL E 1. J2 C ONNE C T IONS
J2 Pin
ADM1022 Function
Parallel Port Function
2 Serial Clock (SCLK )
DB0
3 Serial Data In (SDA)
DB1
8 Manual Reset (MR) DB6
10 Interrupt (INT ) ACK
13 Serial Data Out (SDA) SLCT
19-30 Gnd
Gnd
SMBUS INT E R F A C E C ONNE C T OR J3
T he SMBus interface connector J3 allows the evaluation
board to be connected directly to the SMBus of a personal
computer, using the DIMM interface card provided. T o
make this connection, it may be necessary to remove one
of the DIMM memory modules on the PC motherboard,
if all DIMM sockets are occupied. T his will affect the
BIOS setup and Windows 95, and should only be at-
tempted by a competent user.
RE MOT E SE NSOR SE L E C T SWIT C HE S SW4, SW3
T wo remote sensors are provided on the evaluation board;
a 2N3904 and a 2N3906 transistor. Alternative remote
sensors may be connected between the D1 and D2 termi-
nals on the test connector J4.
T ABL E 2. RE MOT E SE NSOR SE L E C T ; SW4, SW3
SW4 Position
SW3 Position
1 2
Sensor Selected
OF F OF F
C D1/D2(connector J4)
ON -
A
2N3906 (D2)
- ON
-
2N3904 (D1)
ON ON
A
D1 and D2 selected
SE RIAL BUS AD D RE SS SE L E C T (SW2)
SW2 is used to set the two LSB’s of the ADM1022’s se-
rial bus address, A1 and A0. T he ADD pin is tri-state and
can be grounded, left unconnected or tied to V
C C
. T his
means a total of three addresses are possible. It should be
noted that the ADD pin is only read at power-up. If SW2
is changed while the ADM1022 is on, the change of ad-
dress will not be effective until the device has been pow-
ered off, and on again.
As the serial bus address is 7 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
ADM1022 evaluation software stores the 7-bit serial bus
address as left-justified and makes the LSB zero. T able 3
shows the three possible addresses for the ADM1022.
T ABL E 3. AD M1022 D E VIC E AD D RE SSE S
SW2 Position A1 A0
Device Address
A (Gnd)
1 0
5C (Hex)
B (NC)
0 0
58 (Hex)
C (Vcc)
0 1
5A (Hex)
V
MON
SE L E C T SWIT C H, SW1
T his switch allows the V
MON
pin to monitor either the on-
board 3.3V supply, an external 3.3V supply through con-
nector J4, or a larger external supply voltage through J4,
applied across voltage divider network R4, R5. T able 4
shows the relevant switch positions.
T ABL E 4. V
MON
SE L E C T SWIT C H, SW1
SW1 Position Voltage Source (V
mon
)
A
External 5V on J4
B
External 3.3V on J4
C
On-board 3.3V
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