參數(shù)資料
型號(hào)： ADT7462ACPZ-500RL7
廠商： ON SEMICONDUCTOR
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, SQUARE, SURFACE MOUNT
封裝： 5 X 5 MM, LFCSP-32
文件頁(yè)數(shù)： 88/88頁(yè)
文件大小： 836K
代理商： ADT7462ACPZ-500RL7
ADT7462
Rev. 2 | Page 9 of 88 | www.onsemi.com
FUNCTION DESCRIPTION:
EASY CONFIGURATION OPTIONS
There are a number of multifunctional pins on the ADT7462
that need to be configured on power-up to suit the desired
application. Note that due to the large number of pins that need
to be configured, it could take several SMBus transactions to
achieve the required configuration. For this reason, the ADT7462
has five easy configuration options. The user sets a bit in the
easy configuration option register (0x14) to set up the required
configuration (see Table 5).
Table 5. Easy Configuration Register Settings
Easy Configuration Option
Register 0x14 Setting
Option 1
Bit 0 = 1
Option 2
Bit 1 = 1
Option 3
Bit 2 = 1
Option 4
Bit 3 = 1
Option 5
Bit 4 = 1
Once the most convenient easy configuration option has been
set, the user can configure any of the pins individually. The
setup complete bit (Bit 5 of Register 0x01) must then be set to 1
to indicate that the ADT7462 is configured correctly, and then
monitoring of the selected channels begins.
The following is a detailed description of the five easy
configuration options that are available.
Configuration Option 1
Configuration Option 1 is the default configuration. It is also
the most suitable for thermal monitoring, voltage monitoring,
and fan control for single and dual processor systems.
Features of Configuration Option 1 include the following:
One local and three remote temperature channels
Four PWM drives and eight TACH inputs
Two THERM I/Os
Voltage monitoring
+3.3V
+2.5V
+1.8V
VBATT
RESET I/O
CI (chassis intrusion) or FAN2MAX
Figure 4 shows the pin configuration when Configuration
Option 1 is chosen.
PIN 1
INDICATOR
1
TACH1
2
TACH2
3
TACH3
4
TACH4
5
VCC
6
GND
7
TACH5
8
TACH6
24
+2.5V
23
+1.8V
22
TACH8
21
TACH7
20
D3–
19
D3+
18
D2–
17
D2+
9
S
C
L
10
S
D
A
11
A
D
12
A
L
E
R
T
13
P
W
M
4
14
R
E
S
E
T
15
D
1+
16
D
1–
32
P
W
M
2
31
P
W
M
1
30
P
W
M
3
29
T
H
E
R
M
2
28
T
H
E
R
M
1
27
C
I
26
V
B
A
TT
25
+3
.3
V
ADT7462
TOP VIEW
(Not to Scale)
05
569-
010
Figure 4. Configuration Option 1
Table 6. Configuration Option 1
Pin
Function
Configuration Register
Bit Value
11
TACH1
Pin Configuration Register 1
Bit 4 = 1
21
TACH2
Pin Configuration Register 1
Bit 3 = 1
31
TACH3
Pin Configuration Register 1
Bit 2 = 1
41
TACH4
Pin Configuration Register 1
Bit 1 = 1
7
TACH5
Pin Configuration Register 1
Bit 0 = 1
8
TACH6
Pin Configuration Register 2
Bit 7 = 1
13
PWM4
Pin Configuration Register 2
Bit 6 = 1
15
D1+
Pin Configuration Register 1
Bit 6 = 1
16
D1
Pin Configuration Register 1
Bit 6 = 1
19
D3+
Pin Configuration Register 1
Bit 5 = 1
20
D3
Pin Configuration Register 1
Bit 5 = 1
21
TACH7
Pin Configuration Register 2
Bit 3 = 1
22
TACH8
Pin Configuration Register 2
Bit 2 = 1
23
+1.8V
Pin Configuration Register 2
Bits [1:0] = 10
24
+2.5V
Pin Configuration Register 3
Bits [7:6] = 01
25
+3.3V
Pin Configuration Register 3
Bits [5:4] = 00
26
VBATT
Pin Configuration Register 3
Bits [3:2] = 00
27
CI
Pin Configuration Register 3
Bit 1 = 1
281
THERM1
Pin Configuration Register 4
Bits [7:6] = 1×
29
THERM2
Pin Configuration Register 4
Bits [5:4] = 1×
311
PWM1
Pin Configuration Register 4
Bit 3 = 1
321
PWM2
Pin Configuration Register 4
Bit 2 = 1
1 If VIDs are selected, these pins are configured as VIDs. To enable VIDs, set
Bit 7 of Pin Configuration Register 1 (0x10) = 1.
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