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| 型号： | MCP9800DM-PCTL |
| 厂商： | Microchip Technology |
| 文件页数： | 14/42页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR PICTAIL MCP9800 |
| 标准包装： | 1 |
| 系列： | PICtail™ |
| 传感器类型： | 温度 |
| 传感范围： | -55°C ~ 125°C |
| 接口： | I²C，SM 总线 |
| 灵敏度： | ±0.5°C |
| 电源电压： | 2.7 V ~ 5.5 V |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP9800 |
| 产品目录页面： | 683 (CN2011-ZH PDF) |
| 相关产品： | MCP9800A5T-MOTGDKR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGDKR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A5T-MOTGCT-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGCT-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A5T-MOTGTR-ND - IC SENSOR THERMAL 2.7V SOT23-5 MCP9800A0T-MOTGTR-ND - IC SENSOR THERMAL 2.7V SOT23-5 |
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MCP9800/1/2/3
5.3
Registers
The MCP9800/1/2/3 has four registers that are
user-accessible. These registers are specified as the
Ambient Temperature (T A ) register, the Temperature
Limit-set (T SET ) register, the Temperature Hysteresis
(T HYST ) register and device Configuration (CONFIG)
register.
The Ambient Temperature register is a read-only
register and is used to access the ambient temperature
data. The data from the ADC is loaded in parallel in the
Resolution
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
register. The Temperature Limit-set and Temperature
Hysteresis registers are read/write registers that
provide user-programmable temperature limits. If the
ambient temperature drifts beyond the programmed
limits, the MCP9800/1/2/3 outputs an alert signal using
Output Configuration” ). The device Configuration
register provides access for the user to configure the
MCP9800/1/2/3’s various features. These registers are
described in further detail in the following sections.
The registers are accessed by sending Register Point-
ers to the MCP9800/1/2/3 using the serial interface.
This is an 8-bit pointer. However, the two Least
Significant bits (LSbs) are used as pointers and all
other bits need to be cleared < 0 >. This device has addi-
tional registers that are reserved for test and
calibration. If these registers are accessed, the device
may not perform according to the specification. The
pointer description is shown below.
REGISTER 5-1:
REGISTER POINTER
Configuration
Register
Temperature
Register
T HYST
Register
T SET
Register
FIGURE 5-2:
ALERT
Output
ALERT Output
Control Logic
Register Block Diagram.
U-0
0
U-0
0
U-0
0
U-0
0
U-0
0
U-0
0
R/W-0
P1
R/W-0
P0
bit 7
Legend:
bit 0
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-2
bit 1-0
Unimplemented: Read as ‘ 0 ’
Px<1:0>: Pointer bits
00 = Temperature register (T A )
01 = Configuration register (CONFIG)
10 = Temperature Hysteresis register (T HYST )
11 = Temperature Limit-set register (T SET )
.
DS21909D-page 14
? 2010 Microchip Technology Inc.
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