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
●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)

●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