Using the 8051 to Control GPIF Lines | Cypress Semiconductor
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Using the 8051 to Control GPIF Lines
Can the 8051 Directly Control the GPIF CTLx Lines When the EZ-USB FX2 is in GPIF Mode?
Yes, the 8051 can control the GPIF CTLx lines directly through firmware, but only when the GPIF engine is in the IDLE state. The 8051 accesses the CTLx lines through the GPIFIDLECTL register.