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| 型號(hào)： | MS80C31-20R |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 20 MHz, MICROCONTROLLER, PQCC44 |
| 文件頁(yè)數(shù)： | 12/170頁(yè) |
| 文件大?。?/td> | 4133K |
| 代理商： | MS80C31-20R |
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109
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
15.3.4
Signature Section
The signature section is a dedicated memory area used for storing miscellaneous device information, such as the
device signature. Most of this memory section is reserved for internal use, as shown in Table 15-7.
ATtiny4/5/9/10 have a three-byte signature code, which can be used to identify the device. The three bytes reside
in the signature section, as shown in Table 15-7. The signature data for ATtiny4/5/9/10 is given in Table 15-8.
15.3.5
Calibration Section
ATtiny4/5/9/10 have one calibration byte. The calibration byte contains the calibration data for the internal oscillator
and resides in the calibration section, as shown in Table 15-9. During reset, the calibration byte is automatically
written into the OSCCAL register to ensure correct frequency of the calibrated internal oscillator.
15.3.5.1
Latching of Calibration Value
To ensure correct frequency of the calibrated internal oscillator the calibration value is automatically written into the
OSCCAL register during reset.
15.4
Accessing the NVM
NVM lock bits, and all Flash memory sections are mapped to the data space as shown in Figure 5-1 on page 15.
The NVM can be accessed for read and programming via the locations mapped in the data space.
The NVM Controller recognises a set of commands that can be used to instruct the controller what type of pro-
gramming task to perform on the NVM. Commands to the NVM Controller are issued via the NVM Command
Register. See “NVMCMD - Non-Volatile Memory Command Register” on page 114. After the selected command
has been loaded, the operation is started by writing data to the NVM locations mapped to the data space.
Table 15-7.
Signature bytes
Signature word address
Signature word data
High byte
Low byte
0x00
Device ID 1
Manufacturer ID
0x01
Reserved for internal use
Device ID 2
0x02 ... 0x0F
Reserved for internal use
Table 15-8.
Signature codes
Part
Signature Bytes
Manufacturer ID
Device ID 1
Device ID 2
ATtiny4
0x1E
0x8F
0x0A
ATtiny5
0x1E
0x8F
0x09
ATtiny9
0x1E
0x90
0x08
ATtiny10
0x1E
0x90
0x03
Table 15-9.
Calibration byte
Calibration word address
Calibration word data
High byte
Low byte
0x00
Reserved
Internal oscillator calibration value
0x01 ... 0x07
Reserved
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