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参数资料
| 型号： | ADM1026JST |
| 厂商： | ON Semiconductor |
| 文件页数： | 31/55页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL SYS REF/EEPROM 48LQFP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 30/Sept/2009 |
| 标准包装： | 250 |
| 功能： | 硬件监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | 0°C ~ 100°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC，比较器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 管件 |
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ADM1026
GPIO16
GPIO15
? Setting the fan divisors using the fan divisor registers
(Addresses 02h and 03h).
GPIO14
GPIO13
GPIO12
GPIO11
GPIO10
GPIO9
GPIO8
FAN0
?
?
?
Configuring the GPIO pins for input/output polarity, using
GPIO Configuration Registers 1 to 4 (Addresses 08h to
0Bh) and Bits 6 and 7 of Configuration Register 3.
Setting mask bits in Mask Registers 1 to 6 (Addresses
18h to 1Dh) for any inputs that are to be masked out.
Setting up Configuration Registers 1 and 3, as
described in Table 10 and Table 11.
FAN1
Table 10. CONFIGURATION REGISTER 1
NTESTOUT
Figure 59. NAND Tree Test with One Input Stuck High
A similar effect occurs if two adjacent inputs are shorted
together. The example in Figure 60 assumes that the current
sink capability of the circuit driving the inputs is
considerably higher than the source capability, so the inputs
are low if either is low, but high only if both are high.
When GPIO12 goes high the output should go high. But
because GPIO12 and GPIO11 are shorted, they both go high
together, causing a missing pulse in the output pattern.
GPIO16
GPIO15
GPIO14
GPIO13
GPIO12
GPIO11
GPIO10
GPIO9
GPIO8
Bit
0
1
2
3
4
5
6
7
Description
Controls the monitoring loop of the ADM1026. Setting
Bit 0 low stops the monitoring loop and puts the
ADM1026 into low power mode and reduces power
consumption. Serial bus communication is still
possible with any register in the ADM1026 while in
low power mode. Setting bit 0 high starts the
monitoring loop.
Enables or disables the INT interrupt output. Setting
Bit 1 high enables the INT output, setting Bit 1 low
disables the output.
Used to clear the INT interrupt output when set high.
GPIO pins and interrupt status register contents are
not affected.
Configures Pins 27 and 28 as the second external
temperature channel when 0, and as A IN8 and A IN9
when set to 1.
Enables the THERM output when set to 1.
Enables automatic fan speed control on the DAC
output when set to 1.
Enables automatic fan speed control on the PWM
output when set to 1.
Performs a soft reset when set to 1.
FAN0
FAN1
NTESTOUT
Table 11. CONFIGURATION REGISTER 3
Bit Description
Figure 60. NAND Tree Test with Two Inputs Shorted
Using the ADM1026
When power is first applied, the ADM1026 performs a
power ? on reset on all its registers (not EEPROM), which
sets them to default conditions as shown in Table 13. In
particular, note that all GPIO pins are configured as inputs
to avoid possible conflicts with circuits trying to drive these
0
1
2
3–5
6, 7
Configures Pin 42 as GPIO when set to 1 or as
THERM when cleared to 0.
Clears the CI latch when set to 1. Thereafter, a 0
must be written to allow subsequent CI detection.
Selects V REF as 2.5 V when set to 1 or as 1.82 V
when cleared to 0.
Unused.
Set up GPIO16 for direction and polarity.
pins.
The ADM1026 can also be initialized at any time by
writing a 1 to Bit 7 of Configuration Register 1, which sets
some registers to their default power ? on conditions. This bit
should be cleared by writing a 0 to it.
After power ? on, the ADM1026 must be configured to the
user ’s specific requirements. This consists of:
? Writing values to the limit registers.
? Configuring Pins 3 to 6, and 9 to 12 as fan inputs or
GPIO, using Configuration Register 2 (Address 01h).
Starting Conversion
The monitoring function (analog inputs, temperature, and
fan speeds) in the ADM1026 is started by writing to
Configuration Register 1 and setting Start (Bit 0) high. The
INT_Enable (Bit 1) should be set to 1, and INT Clear (Bit 2)
set to 0 to enable interrupts. The THERM enable bit (Bit 4)
should be set to 1 to enable temperature interrupts at the
THERM pin. Apart from initially starting together, the
analog measurements and fan speed measurements proceed
independently, and are not synchronized in any way.
http://onsemi.com
31
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| ADM1026JST-REEL | 功能描述:IC CNTRL SYS REF/EEPROM 48LQFP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
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