PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
7542 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0006-0200Z
Rev.2.00
2003.04.21
DESCRIPTION
The 7542 Group is the 8-bit microcomputer based on the 740 fam-
ily core technology.
The 7542 Group has serial I/Os, 8-bit timers, 16-bit timers, and an
A-D converter, and is useful for control of home electric appliances
and office automation equipment.
FEATURES
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Basic machine-language instructions ...................................... 71
The minimum instruction execution time ..
0.25
µ
s (Target Spec.)
(at 8 MHz oscillation frequency, double-speed mode for the
shortest instruction)
Memory size
Flash memory version: ROM .............................. 32K + 4K bytes
RAM ..................................... 1024 bytes
Mask ROM version:
ROM ............................. 8K to 16K bytes
RAM ............................ 384 to 512 bytes
RSS version
RAM ..................................... 1024 bytes
Programmable I/O ports ....................... 29 (25 in 32-pin version)
Interrupts ................................................. 18 sources, 16 vectors
(14 sources, 14 vectors in 32-pin version)
Timers ............................................................................. 8-bit
✕
2
...................................................................................... 16-bit
✕
2
Output compare ............................................................ 4-channel
Input capture ................................................................ 2-channel
Serial I/O ...................... 8-bit
✕
2 (UART or Clock-synchronized)
A-D converter ............................................... 10-bit
✕
8 channels
...................................................... (6 channels in 32-pin version)
Clock generating circuit ............................................. Built-in type
(low-power dissipation by a ring oscillator)
(connected to external ceramic resonator or quartz-crystal
oscillator permitting RC oscillation)
Watchdog timer ............................................................ 16-bit
✕
1
•
Power source voltage
X
IN
oscillation frequency at ceramic oscillation, in double-speed mode
At 8 MHz ................................................................................
TBD
X
IN
oscillation frequency at ceramic oscillation, in high-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
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Power dissipation ..................................................................
TBD
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Operating temperature range ................................... –20 to 85 °C
(–40 to 85 °C for extended operating temperature version)
(–40 to 125 °C for extended operating temperature 125 °C ver-
sion (Note
1))
•
Notes 1:
In this version, the operating temperature range and total time are
limited as follows;
55 °C to 85 °C: within total 6000 hours,
85 °C to 125 °C: within total 1000 hours.
2:
This is not a final specification. Some parametric limits are subject
to change.Please contact Renesas or an authorized Renesas
product distributor in the case of examination of use.
APPLICATION
Office automation equipment, factory automation equipment, home
electric appliances, consumer electronics, car, etc.
Rev.2.00
2003.04.21
page 1 of 97
Analogue and Mixed Signal
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