DESCRIPTION The 7641 group is the 8-bit microcomputer based on the 7600 series core (740 family core compatible) technology. The 7641 group is designed for PC peripheral devices, including the USB, DMAC, Serial I/O, UART, Timer, Master CPU bus interface and so on. FEATURES <Microcomputer mode) ● Basic machine-language instructions ....................................... 71 ● Minimum instruction execution time ..................................... 83 ns (at 24 MHz oscillation frequency) ● Memory size ROM ............................................................................. 32 Kbytes RAM ................................................................................ 1 Kbytes ● Programmable input/output ports ............................................. 66 ● Software pull-up resistors .................................................. Built-in ● Interrupts ................................................... 24 sources, 24 vectors (external 5 including Key input, internal 18, software 1) ● USB function control unit Transceiver ............................................... USB std. spec. ver.1.1 ● Timers ..................................................... 16-bit ✕ 2 (Timers X, Y) 8-bit ✕ 3 (Timers 1, 2, 3) ● Serial I/O ......................................................................... 8-bit ✕ 1 ● UART .............................................................................. 8-bit ✕ 2 ● DMAC .......................................................................... 2 channels ● Master CPU bus interface ................................................. 2 bytes ● Special count source generator ...................................... 8-bit ✕ 1 ● Clock generating circuit ..................................................... Built-in (connect to external ceramic resonator or quartz-crystal oscillator) ● Power source voltage At 24 MHz oscillation frequency, φ = 12 MHz ......... 4.15 to 5.25 V At 24 MHz oscillation frequency, φ = 6 MHz ........... 3.00 to 3.60 V ● Operating temperature range .................................... –20 to 70°C ● Packages FP ............................................................. 80P6N-A (80-pin QFP) HP ........................................................... 80P6Q-A (80-pin LQFP) <Flash memory mode> ● Power source voltage At 24 MHz oscillation frequency, φ = 6 MHz ........... 4.15 to 5.25 V At 24 MHz oscillation frequency, φ = 6 MHz ........... 3.00 to 3.60 V ● Program/Erase voltage ............................. VPP = 4.50 V to 5.25 V At 24 MHz oscillation frequency, φ = 6 MHz ● Memory size Flash ROM .................................................................... 32 Kbytes RAM ............................................................................. 2.5 Kbytes ● Flash memory mode ....................................................... 3 modes Parallel I/O mode Standard serial I/O mode CPU rewrite mode ● Programming method ....................... Programming in unit of byte ● Erasing method Batch erasing Block erasing ● Program/Erase control by software command ● Command number ................................................... 6 commands ● Number of times for programming/erasing ............................. 100 ● ROM code protection Available in parallel I/O mode and standard serial I/O mode APPLICATION Audio, musical instrument, printer, scanner, modem, other PC peripheral devices
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