at89lp2052-20xi ATMEL Corporation, at89lp2052-20xi Datasheet - Page 70

• Manufacturer Part Number: at89lp2052-20xi
• Description: At89lp2052 8-bit Microcontroller With 2/4-kbyte Flash
• Manufacturer: ATMEL Corporation

23.4.15
70
AT89LP2052/LP4052
Read Status
Function:
Usage:
Figure 23-19. Read Status Sequence
Note:
• Read memory status byte.
1. Bring CS (P3.2) low.
2. Drive P1 to 0xAA and pulse XTAL1 high.
3. Drive P1 to 0x60 and pulse XTAL1 high.
4. Drive P1 to 0x00 and pulse XTAL1 high.
5. Drive P1 to 0x00 and bring XTAL1 high.
6. Tri-state P1.
7. Bring XTAL1 low.
8. Read data from P1.
9. Drive CS high.
XTAL1
The waveform on this page is not to scale.
CS
P1
AAh
60h
00h
00h
1111SSSS
3547H–MICRO–5/07