38D2 GROUP

      The 38D2 GROUP is the 8-bit microcomputer based on the 740 Family core technology. The 38D2 Group is pin-compatible with the 38C2 Group. The 38D2 Group has an LCD drive control circuit, an A/D converter, a serial interface, and a ROM correction function and on-chip oscillator as additional functions. The QzROM version and the flash memory version are available.The flash memory version does not have a selection function for the oscillation start mode. Only the on-chip oscillator starts oscillating. The various microcomputers include variations of memory size, and packaging. For details, refer to the section on part numbering.
     38D2 GROUP has many unique features which is as follows: The minimum instruction execution time is 0.32 s(at 12.5 MHz oscillation frequency). Memory size (QzROM version): ROM is 16 K to 60 K bytes, RAM is 640 to 2048 bytes. Memory size (Flash memory version): ROM is 60 K bytes, RAM is 2048 bytes. Programmable input/output ports is 51 (common to SEG: 24). Interrupts is 18 sources, 16 vectors.Timers is 8-bit * 4, 16-bit * 2. Serial interface is 8-bit * 2 (UART or Clock-synchronized). PWM is 10-bit * 2, 16-bit * 1 (common to IGBT output). A/D converter is 10-bit * 8 channels(A/D converter can be operated in low-speed mode.). Watchdog timer is 8-bit * 1. ROM correction function is 32 bytes * 2 vectors. LED direct drive port is 8(average current: 15 mA, peak current: 30 mA, total current: 90 mA). LCD drive control circuit: Bias is 1/2, 1/3. Duty is 2, 3, 4. Common output is 4. Segment output is 24.Main clock generating circuit is 1(connect to external ceramic resonator or on-chip oscillator).
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