at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 23

• Manufacturer Part Number: at89c51ac3-s3sim
• Description: At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
• Manufacturer: ATMEL Corporation

4383D–8051–02/08
CPU Clock
Figure 11. External Data Read Waveforms
Notes:
Figure 12. External Data Write Waveforms
CPU Clock
Notes:
RD#1
WR#1
ALE
ALE
P0
P2
P0
P2
1. RD# signal may be stretched using M0 bit in AUXR register.
2. When executing MOVX @Ri instruction, P2 outputs SFR content.
1. WR# signal may be stretched using M0 bit in AUXR register.
2. When executing MOVX @Ri instruction, P2 outputs SFR content.
P2
P2
DPL or Ri
DPL or Ri
DPH or P22
DPH or P22
D7:0
D7:0
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