SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Description
7540 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0011-0400 Rev.
4.
00
Jun 21, 2004
DESCRIPTION
The 7540 Group is the 8-bit microcomputer based on the 740 family core technology.
The 7540 Group has a serial I/O, 8-bit timers, a 16-bit timer, and an A/D converter, and is useful for control of home electric appliances and office automation equipment.
FEATURES
• Basic machine-language instructions .
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71 • The minimum instruction execution time 0.
34 µs
(at 6 MHz oscillation frequency, double-speed mode for the shortest instruction) • Memory size ROM .
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8 K to 32 K bytes
RAM 384 to 768 bytes • Programmable I/O ports .
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29 (25 in 32-pin version) • Interrupts .
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15 sources, 15 vectors
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(14 sources, 14 vectors for 32-pin version) • Timers .
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8-bit ✕ 4
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16-bit ✕ 1 • Serial I/O1 .
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8-bit ✕ 1 (UART or Clock-synchronized) • Serial I/O2 (Note 1) .
8-bit ✕ 1 (Clock-synchronized) • A/D converter .
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10-bit ✕ 8 channels
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(6 channels for 32-pin version) • Clock generating circuit Built-in type
(low-power dissipation by an on-chip oscillator enabled) (connect to external ceramic resonator or quartz-crystal oscillator permitting RC oscillation) • Watchdog timer 16-bit ✕ 1 • Power source voltage XIN oscillation frequency at ceramic oscillation, in double-speed mode At 6 MHz .
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