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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATtiny167-ESSZ датащи(PDF) 228 Page - ATMEL Corporation |
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ATtiny167-ESSZ датащи(HTML) 228 Page - ATMEL Corporation |
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228 / 282 page  228 7728D–AVR–07/09 ATtiny87/ATtiny167 21.4 Calibration Byte The ATtiny87/167 has a byte calibration value for the internal RC Oscillator. This byte resides in the high byte of address 0x000 in the signature address space. During reset, this byte is automatically written into the OSCCAL Register to ensure correct frequency of the calibrated RC Oscillator. 21.5 Page Size 21.6 Parallel Programming Parameters, Pin Mapping, and Commands This section describes how to parallel program and verify Flash Program memory, EEPROM Data memory, Memory Lock bits, and Fuse bits in the ATtiny87/167. Pulses are assumed to be at least 250 ns unless otherwise noted. 21.6.1 Signal Names In this section, some pins of the ATtiny87/167 are referenced by signal names describing their functionality during parallel programming, see Figure 21-1 and Figure 21-9. Pins not described in the following table are referenced by pin names. The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse. The bit coding is shown in Figure 21-11. When pulsing WR or OE, the command loaded determines the action executed. The different commands are shown in Figure 21-12. Table 21-7. Number of Words in a Page and No. of Pages in the Flash Device Flash Size Page Size PCWORD No. of Pages PCPAGE PCMSB ATtiny87 4K words 64 words PC[5:0] 64 PC[11:6] 11 ATtiny167 8K words 64 words PC[5:0] 128 PC[12:6] 12 Table 21-8. Number of Words in a Page and No. of Pages in the EEPROM Device EEPROM Size Page Size PCWORD No. of Pages PCPAGE EEAMSB ATtiny87 ATtiny167 512 bytes 4 bytes EEA[1:0] 128 EEA[8:2] 8 |
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