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Can an ECP emulate other port types?

April 26, 2017ECP emulate port types

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Can an ECP emulate other port types?

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An ECP has several internal modes. In addition to ECP mode, an ECP can emulate an SPP (original) or PS/2-type (Byte-mode, or simple bidirectional) port. Many ECPs also support EPP emulation. Fast Centronics is an additional mode that gives faster performance with many SPP-type peripherals. ECP internal modes: 000 SPP 001 Byte 010 Fast Centronics 011 ECP 100 EPP 101 Reserved 110 Test 111 Config Set the mode in bits 7, 6, and 5 of the ECR at base address + 402h.