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7546

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

7546 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

REJ03B0160-0121

Rev.1.21

Nov 15, 2006

DESCRIPTION

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 cir-

cuit, and the function set ROM are added.

FEATURES

• Basic machine-language instructions ...................................... 71

• The minimum instruction execution time ............................. 0.25 µs

(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 ✕ 2

...................................................................................... 16-bit ✕ 2

• Output compare ............................................................ 4-channel

• Input capture ................................................................ 2-channel

• Serial interface ............ 8-bit ✕ 2 (UART or Clock-synchronized)

• A/D converter ............................................... 10-bit ✕ 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 ✕ 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 °C

Rev.1.21 Nov 15, 2006 page 1 of 93

REJ03B0160-0121

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