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AT89LP4052-20PI 데이터시트(PDF) 64 Page - ATMEL Corporation

부품명 AT89LP4052-20PI
상세설명  8-bit Microcontroller with 2/4-Kbyte Flash
PDF  90 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89LP4052-20PI 데이터시트(HTML) 64 Page - ATMEL Corporation

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64
3547F–MICRO–6/06
AT89LP2052/LP4052
22.4.9
Read User Signature Page
Function:
• Read 1 to 32 bytes of data from the User Signature Row.
• The byte address (offset in page) is initialized to bits [4:0] of the low address byte. The
internal address is incremented by one on the negative edge of the XTAL1 pulse. The
address will wrap around to the 1st byte of the page when incremented past 31.
• Read data will be output on P1 after the falling edge of fourth XTAL1 pulse (address low byte
strobe). The programmer should tri-state P1 prior to this edge to avoid bus contention on P1.
Usage:
1.
Bring CS (P3.2) low.
2.
Drive P1 to AAh and pulse XTAL1 high.
3.
Drive P1 to 32h and pulse XTAL1 high.
4.
Drive P1 to 00h and pulse XTAL1 high.
5.
Drive P1 with bits [4:0] of address and bring XTAL1 high.
6.
Tri-state P1.
7.
Bring XTAL1 low.
8.
Read data from P1.
9.
To read additional data bytes in the page, pulse XTAL1 high to increment to the next
address.
10. Drive CS high.
Figure 22-13. Read User Signature Page Sequence
Note:
The waveform on this page is not to scale.
AAh
32h
00h
000bbbbb
DOUT 0
CS
XTAL1
P1
DOUT 1
DOUTn



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