UPSD3212C Datasheet, PDF (130/152 Pages) STMicroelectronics – Flash Programmable System Devices with 8032 Microcontroller Core and 16Kbit SRAM

UPSD3212C, UPSD3212CV
Figure 66. External Data Memory READ Cycle
ALE
PSEN
RD
PORT 0
PORT 2
tLHLL
tWHLH
tLLDV
tLLWL
tRLRH
tAVLL
tLLAX2
A0-A7 from
RI or DPL
tAVWL
tAVDV
tRLDV
tRLAZ
tRHDZ
DATA IN
tRHDX
A0-A7 from PCL
INSTR IN
P2.0 to P2.3 or A8-A11 from DPH
A8-A11 from PCH
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Figure 67. External Data Memory WRITE Cycle
ALE
PSEN
WR
PORT 0
PORT 2
tLHLL
tWHLH
tLLWL
tWLWH
tAVLL
tLLAX
A0-A7 from
RI or DPL
tAVWL
tQVWX
tQVWH
DATA OUT
P2.0 to P2.3 or A8-A11 from DPH
tWHQX
A0-A7 from PCL
INSTR IN
A8-A11 from PCH
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