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