Zilog Inc. has announced its ZLR64400 family of 8-bit MCU devices, which is the latest addition to its Crimzon line of infrared-specific silicon. In common with ZLP12840 OTP (one time programmable device), launched last year, the ZLR64400 features an on-chip ability to learn codes from other infrared remote controls via a learning circuit.

Learning features are fast becoming a standard feature in mid- to high-end remote controllers. The ability to capture an IR signal from any other remote control and then duplicate it on the "learning" remote enables a universal remote control to consolidate several single device remotes and add codes from newly purchased devices, with the obvious associated benefits to the consumer. Once the codes are captured, they are mapped to keys on the universal remote via integrated firmware.

Zilog identified the need for a larger on-chip database for better geographic, model, brand and device code coverage, thus requiring more than 32 K of ROM. In addition, high-end remote controls often include this learning capability, requiring a learning amplification circuit which had — until the introduction of the ZLP12840 — been external to the MCU.

The IR learning function reduces development time and the number of components, equating to a significant savings on overall bills of material. Available immediately, the ZLR64400 devices are priced at $1.72 in 10,000-unit quantities.

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