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