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| 型号： | TC77-3.3MOATR |
| 厂商： | Microchip Technology |
| 文件页数： | 11/22页 |
| 文件大小： | 374K |
| 描述： | IC THERMAL SENSR SPI 3.3V 8-SOIC |
| 标准包装： | 3,300 |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC（三角积分型），寄存器库 |
| 输出类型： | MICROWIRE?，SPI? |
| 输出警报： | 无 |
| 输出风扇： | 无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
| 配用： | TC77DM-PICTL-ND - BOARD DEMO PICTAIL TC77 |
?2002 Microchip Technology Inc.
DS20092A-page 11
TC77
4.0
INTERNAL REGISTER
STRUCTURE
The TC77 Internal register structure consists of three
registers. The Temperature and Manufacturers Identi-
fication registers are read only, while the Configuration
register is write only.
TABLE 4-1:
REGISTERS FOR TC77
4.1
Configuration Register (CONFIG)
The Configuration register is write only. This register
selects either Shutdown, Continuous Conversion or
Test modes:
" C15:C0 = XXXX/XXXX 1111/1111 (Shutdown
mode)
" C15:C0 = XXXX/XXXX 0000/0000 (Continuous
Conversion mode)
" The TC77 is in Shutdown mode when bits C0 to
C7 are all equal to 1s. The TC77 will be in the
Continuous Conversion mode if a 0 in any bit
location from C0 to C7 is written to the Configura-
tion register. The TC77 is in the Continuous
Conversion mode at power-up.
It is recommended that the user write all 0s or all 1s
to the Configuration register because other bit codes
may put the TC77 in a test mode used for calibration
and production verification tests. Section 3.3 lists the
Configuration register bit codes that can be written to
the TC77 without having the device enter a production
test mode.
During Shutdown mode, the serial bus is still active.
The current consumption of the TC77 will be less than
1 礎 during the time between serial communication.
4.2
Temperature Register (TEMP)
The Temperature register is read only and holds the
temperature conversion data. Bits 0 and 1 are unde-
fined and will be tri-state outputs during a read
sequence. Bit 2 is set to a logic 1 after completion of
the first temperature conversion following a power-up
or reset event. Bit 2 is set to a logic 0 during the time
needed to complete the first temperature conversion.
Therefore, the status of bit 2 can be monitored to indi-
cate that the TC77 has completed the first temperature
conversion. Bits 15:3 contain the 13 bit twos comple-
ment data from the temperature conversion.
4.3
Manufacturers ID Register (M_ID)
The Manufacturers Identification code is contained in
this read only register. The Manufacturer ID register is
only available for a read operation when the TC77 is in
Shutdown mode. The Manufacturers ID code is con-
tained in bits 15:8 and is equal to 54 hex to indicate a
Microchip device. Bits 1:0 are undefined and will be tri-
state outputs during a read sequence, while bits 7:2 are
set to 0.
Name
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
Value at Powerup/Reset
CONFIG C15 C14 C13 C12 C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 XXXX/XXXX 0000/0000
TEMP
T12 T11 T10 T9 T8
T7 T6 T5 T4 T3 T2 T1 T0
*
x
x 1111/1111 0000/0*XX
M_ID
0
1
0
1
0
1
0
0
0
0
0
0
0
0
x
x 0101/0100 0000/00XX
* Bit 2 = 0 during power-up; otherwise, bit 2 =1
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