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.
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FEATURES
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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)
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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
Rev.1.21 Nov 15, 2006
REJ03B0160-0121
page 1 of 93
7546 Group
Table 1 Performance overview
Parameter
Number of basic instructions
Instruction execution time
Oscillation frequency
Memory sizes
Function
71
0.25
µs
(Minimum instruction, oscillation frequency 8 MHz: double-speed mode)
8 MHz (max.)
ROM
8 K to 16 K bytes
RAM
384 to 512 bytes
I/O port
P0, P1, P2, P3
•8-bit
✕
1, 6-bit
✕
2, 5-bit
✕
1
Interrupts
18 sources, 16 vectors
Timer
•8-bit
✕
2, 16-bit
✕
2
Output compare
4 channel
Input capture
2 channel
Serial interface
8-bit
✕
2 (UART or clock synchronous)
A/D converter
10-bit
✕
6 channel
Watchdog timer
16-bit
✕
1
Clock generating circuit
Built-in
(external ceramic resonator or quartz-crystal oscillator, RC oscillation available)
(Low consumption current by on-chip oscillator available)
Power source
Double-speed mode At 8MHz oscillation
4.5 to 5.5 V
voltage
At 6.5MHz oscillation 4.0 to 5.5 V
(at ceramic
At 2MHz oscillation
2.4 to 5.5 V
resonance)
At 1MHz oscillation
2.2 to 5.5 V
High-speed mode
At 8MHz oscillation
4.0 to 5.5 V
Middle-speed mode At 4MHz oscillation
2.4 to 5.5 V
Power source
voltage
High-speed mode
Middle-speed mode
At 2MHz oscillation
At 4MHz oscillation
At 2MHz oscillation
2.2 to 5.5 V
4.0 to 5.5 V
2.4 to 5.5 V
2.2 to 5.5 V
1.8 to 5.5 V
29.5 mW (Typ.)
-20 to 85 °C
CMOS sillicon gate
32-pin plastic molded SDIP/LQFP
36-pin plastic molded WQFN
(at RC oscillation)
At 1MHz oscillation
Power source voltage (at on-chip oscillation)
Power dissipation
Operating temperature range
Device structure
Package
Rev.1.21 Nov 15, 2006
REJ03B0160-0121
page 4 of 93
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