7546

• Basic machine-language instructions ...................................... 71
• The minimum instruction execution time ............................. 0.25 s (at 8 MHz oscillation frequency, double-speed mode for the shortest instruction)
• Memory size ROM................................ 8K, 16K bytes RAM ............................... 384, 512 bytes
• Programmable I/O ports ........................................................... 25
• Interrupts ................................................. 18 sources, 16 vectors
• Timers ............................................................................. 8-bit X 2 
...................................................................................... 16-bit X 2
• Output compare ............................................................ 4-channel
• Input capture ................................................................ 2-channel
• Serial interface ............ 8-bit X 2 (UART or Clock-synchronized)
• A/D converter ............................................... 10-bit X 6 channels
• Clock generating circuit ............................................. Built-in type
(low-power dissipation by an on-chip oscillator) (connected to external ceramic resonator or quartz-crystal oscillator permitting RC oscillation)
• Watchdog timer ............................................................ 16-bit X 1
• Power-on reset circuit ............................................... Built-in type
• Low voltage detection circuit ..................................... Built-in type
• Power source voltage XIN oscillation frequency at ceramic oscillation, in double-speed mode
At 8 MHz .................................................................... 4.5 to 5.5 V
At 6.5 MHz ................................................................. 4.0 to 5.5 V
At 2 MHz .................................................................... 2.4 to 5.5 V
At 1 MHz .................................................................... 2.2 to 5.5 V
XIN oscillation frequency at ceramic oscillation, in high-speed mode or middle-speed mode
At 8 MHz .................................................................... 4.0 to 5.5 V
At 4 MHz .................................................................... 2.4 to 5.5 V
At 2 MHz .................................................................... 2.2 to 5.5 V
XIN oscillation frequency at RC oscillation in high-speed mode or middle-speed mode
At 4 MHz .................................................................... 4.0 to 5.5 V
At 2 MHz .................................................................... 2.4 to 5.5 V
At 1 MHz .................................................................... 2.2 to 5.5 V
XIN oscillation frequency at on-chip oscillation ......... 1.8 to 5.5 V
• Power dissipation ................................................ 29.5 mW (Typ.)
• Operating temperature range................................... 20 to 85

The 7546 Group is the QzROM version of 7542 Group.

The 7546 Group has the pin-compatibilty with the 7542 Group. As new functions, the power-on reset, the low voltage detection circuit, and the function set ROM are added.