S3C7281
S3C7281 is The S3C7281 is a SAM48 core-based 4-bit CMOS single-chip microcontroller. It is built around the SAM48 core CPU and contains ROM/ RAM. manufactured by Samsung Semiconductor.
OVERVIEW
OVERVIEW
PRODUCT OVERVIEW
The S3C7281 is a SAM48 core-based 4-bit CMOS single-chip microcontroller. It is built around the SAM48 core CPU and contains ROM, RAM. 14 I/O lines, buzzer and inverted buzzer output, and LCD driver/controller with an up-to-64-dot. The S3C7281 can be used for dedicated control functions in a variety of applications, and is especially designed for LCD general purpose.
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PRODUCT OVERVIEW
FEATURES
Memory
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Memory Mapped I/O Structure
- 1024 x 8 bit program memory 64 x 4 bit data memory (Including stack and excluding LCD RAM)
Data memory bank 15
Power-Down Modes
- Idle: only CPU clock stops Stop: Main System clock and CPU clock stops Subsystem clock stop mode
14 I/O Pins
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I/O: 6 pins Output: 8 pins(Sharing with segment outputs)
Oscillation Sources 8-Bit Basic Timer
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Main: Internal RC OSC(1MHz) Sub: External 32.8k Hz crystal only
4 clock source(0.26, 2.1, 8.2, 32.8ms at 1MHz) Watch-dog timer
Instruction Execution Times Watch Timer
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- Main system clocks:4, 8, 64µs at 1MHz Subsystem clocks: 122 µs at 32.768 k Hz
Quasi interrupt(stand by release mode only) Time divider: 3.91, 32, 125, 500ms at fw=32.8k Hz BUZ, BUZ output(0.5, 1, 2, 4k Hz at 1MHz<main>, 32.8k Hz<sub>)
Operating Voltage Range
- 1.8 V to 5.5 V at 1MHz/32.8k Hz
Key Interrupt input(Quasi-interrupt)
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Power Consumption(The LVD circuit needs 100u A or more current on all the below mode)
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Falling edge detection(KS0, KS1) Stand by mode(idle, stop) release
Main: Operation
- 0.5m A at 1MHz, 3V Sub: Operation
- 12µA at LCD off, 3V Idle
- 5µA at LCD off idle, 3V...
