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