ADT7462ACPZ-REEL7 ON Semiconductor, ADT7462ACPZ-REEL7 Datasheet - Page 10

• Manufacturer Part Number: ADT7462ACPZ-REEL7
• Description: IC TEMP/VOLT MONITOR 32-LFCSP
• Manufacturer: ON Semiconductor

Specifications of ADT7462ACPZ-REEL7

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-LFCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Function Description: Easy Configuration Options
ADT7462 that need to be configured on powerup 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 1).
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.
configuration options that are available.
Configuration Option 1
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:
•
•
•
•
•
•
•
•
•
•
Option 1 is chosen.
Table 1. Easy Configuration Register Settings
There are a number of multifunctional pins on the
Once the most convenient easy configuration option has
The following is a detailed description of the five easy
Configuration Option 1 is the default configuration. It is
Figure 19 shows the pin configuration when Configuration
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
V
RESET I/O
CI (chassis intrusion) or FAN2MAX
Easy Configuration Option
BATT
Option 1
Option 2
Option 3
Option 4
Option 5
Register 0x14 Setting
Bit 0 = 1
Bit 1 = 1
Bit 2 = 1
Bit 3 = 1
Bit 4 = 1
http://onsemi.com
10
Table 2. Configuration Option 1
†If VIDs are selected, these pins are configured as VIDs. To
28
31
32
Pin
13
15
16
19
20
21
22
23
24
25
26
27
29
1
2
3
4
7
8
enable VIDs, set Bit 7 of Pin Configuration Register 1 (0x10) = 1.
†
†
†
†
†
†
†
THERM1
THERM2
Function
TACH1
TACH2
TACH3
TACH4
TACH5
TACH6
TACH7
TACH8
PWM4
PWM1
PWM2
V
+1.8V
+2.5V
+3.3V
TACH1
TACH2
TACH3
TACH4
TACH5
TACH6
D1+
D1−
D3+
D3−
BATT
Figure 19. Configuration Option 1
CI
GND
V
CC
1
2
3
4
5
6
7
8
Configuration Register
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 2
Pin Configuration Reg 2
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 1
Pin Configuration Reg 2
Pin Configuration Reg 2
Pin Configuration Reg 2
Pin Configuration Reg 3
Pin Configuration Reg 3
Pin Configuration Reg 3
Pin Configuration Reg 3
Pin Configuration Reg 4
Pin Configuration Reg 4
Pin Configuration Reg 4
Pin Configuration Reg 4
PIN 1
INDICATOR
(Not to Scale)
ADT7462
TOP VIEW
24
23
22
21
20
19
18
17
+2.5V
+1.8V
TACH8
TACH7
D3–
D3+
D2–
D2+
Bit 4 = 1
Bit 3 = 1
Bit 2 = 1
Bit 1 = 1
Bit 0 = 1
Bit 7 = 1
Bit 6 = 1
Bit 6 = 1
Bit 6 = 1
Bit 5 = 1
Bit 5 = 1
Bit 3 = 1
Bit 2 = 1
Bits [1:0] = 10
Bits [7:6] = 01
Bits [5:4] = 00
Bits [3:2] = 00
Bit 1 = 1
Bits [7:6] = 1×
Bits [5:4] = 1×
Bit 3 = 1
Bit 2 = 1
Bit Value