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7546 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0160-0122
Rev.1.22
Mar 13, 2009
DESCRIPTION
The 7546 Group is the QzROM version of 7542 Group.
The 7546 Group has the pin-compatibility 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
X
IN
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
X
IN
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
X
IN
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
X
IN
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
REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 1 of 100
stm32/stm8
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