LC723748

Ordering number : EN5931 CMOS IC LC723732/40/48/56/64 ETR Microcontrollers Overview The LC723700 Series are large-capacity ETR microcontrollers that achieve an instruction execution time of 1.33 µs and provide up to 64 KB of ROM and up to 2 KB of RAM. They include an on-chip high-performance PLL circuit that features an added high-speed lock circuit and can control the C/N characteristics of a local oscillator. They also provide a rich set of on-chip interface circuits, including a 3-channel serial I/O port, and an 8input 8-bit A/D converter. Functions ROM — Up to 32K steps (32,767 × 16 bits) — The subroutine area holds 4 K steps (4,096 × 16 bits) RAM — Up to 4 K × 4 bits (In banks 00 through 3F) LC723732 – ROM: 32 KB, RAM 1 KB LC723740 – ROM: 40 KB, RAM 2 KB LC723748 – ROM: 48 KB, RAM 2 KB LC723756 – ROM: 56 KB, RAM 2 KB LC723764 – ROM: 64 KB, RAM 2 KB Stack — 32 levels Serial I/O — Three channels. These circuits can support both 2wire and 3-wire 8-bit communication techniques, and can be switched between MSB first and LSB first operation. — One of six internally generated serial transfer clock rates can be selected: 12.5, 37.5, 187.5, 281.25, 375, and 450 kHz. External interrupts — Seven interrupt inputs (pins INT0 through INT5, and the HOLD pin) These interrupts can be set to switch between rising and falling edges, although the HOLD pin only supports falling edge detection. Internal interrupts — Seven interrupts; four internal timer interrupts, and th...