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| 型號(hào)： | MC80C52EXXX-12SC |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CDIP40 |
| 文件頁數(shù)： | 68/125頁 |
| 文件大小： | 6456K |
| 代理商： | MC80C52EXXX-12SC |
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250
7707F–AVR–11/10
AT90USB82/162
1.
Set XA1, XA0 to “10”. This enables command loading.
2.
Set BS1 to “0”.
3.
Set DATA to “0001 0000”. This is the command for Write Flash.
4.
Give XTAL1 a positive pulse. This loads the command.
B. Load Address Low byte (Address bits 7..0)
1.
Set XA1, XA0 to “00”. This enables address loading.
2.
Set BS2, BS1 to “00”. This selects the address low byte.
3.
Set DATA = Address low byte (0x00 - 0xFF).
4.
Give XTAL1 a positive pulse. This loads the address low byte.
C. Load Data Low Byte
1.
Set XA1, XA0 to “01”. This enables data loading.
2.
Set DATA = Data low byte (0x00 - 0xFF).
3.
Give XTAL1 a positive pulse. This loads the data byte.
D. Load Data High Byte
1.
Set BS1 to “1”. This selects high data byte.
2.
Set XA1, XA0 to “01”. This enables data loading.
3.
Set DATA = Data high byte (0x00 - 0xFF).
4.
Give XTAL1 a positive pulse. This loads the data byte.
E. Latch Data
1.
Set BS1 to “1”. This selects high data byte.
2.
Give PAGEL a positive pulse. This latches the data bytes. (See Figure 25-3 for signal
waveforms)
F. Repeat B through E until the entire buffer is filled or until all data within the page is loaded.
While the lower bits in the address are mapped to words within the page, the higher bits address
the pages within the FLASH. This is illustrated in Figure 25-2 on page 251. Note that if less than
eight bits are required to address words in the page (pagesize < 256), the most significant bit(s)
in the address low byte are used to address the page when performing a Page Write.
G. Load Address High byte (Address bits15..8)
1.
Set XA1, XA0 to “00”. This enables address loading.
2.
Set BS2, BS1 to “01”. This selects the address high byte.
3.
Set DATA = Address high byte (0x00 - 0xFF).
4.
Give XTAL1 a positive pulse. This loads the address high byte.
H. Load Address Extended High byte (Address bits 23..16)
1.
Set XA1, XA0 to “00”. This enables address loading.
2.
Set BS2, BS1 to “10”. This selects the address extended high byte.
3.
Set DATA = Address extended high byte (0x00 - 0xFF).
4.
Give XTAL1 a positive pulse. This loads the address high byte.
I. Program Page
1.
Set BS2, BS1 to “00”
2.
Give WR a negative pulse. This starts programming of the entire page of data.
RDY/BSY goes low.
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