8242 Просмотр технического описания (PDF) - Intel

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8242

UNIVERSAL PERIPHERAL INTERFACE 8-BIT SLAVE MICROCONTROLLER

Intel 

UPI-41AH 42AH

WAVEFORMS (Continued)

DMA

PORT 2

210393 – 25

PORT TIMING DURING EXTERNAL ACCESS (EA)

210393 – 26

210393 – 27

On the Rising Edge of SYNC and EA is Enabled Port Data is Valid and can be Strobed On the Trailing Edge of Sync

the Program Counter Contents are Available

18

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