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KS57C2504 Datasheet

  • KS57C2504

  • 4-BIT CMOS MICROCONTROLLER

  • 759.38KB

  • 94頁

  • SAMSUNG   SAMSUNG

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KS57C2504
4-BIT CMOS Microcontroller
Product Specification
OVERVIEW
The S3C7254 single-chip CMOS microcontroller has been designed for high performance using Samsung's
newest 4-bit CPU core, SAM4 (Samsung Arrangeable Microcontrollers).With a two-channel comparator, up-to-
320-dot LCD direct drive capability, 8-bit timer/counter, and serial I/O, the S3C7254 offers an excellent design
solution for a wide variety of applications which require LCD functions.
Up to 27 pins of the 80-pin QFP package can be dedicated to I/O. Eight vectored interrupts provide fast response
to internal and external events. In addition, the S3C7254's advanced CMOS technology provides for low power
consumption and a wide operating voltage range.
FEATURES
Memory
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512
4-bit RAM
4096
8-bit ROM
8-Bit Timer/Counter
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27 I/O Pins
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I/O: 15 pins
Input only: 4 pins
Output only: 8 pins
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Programmable 8-bit timer
External event counter
Arbitrary clock frequency
output
External clock signal divider
Serial I/O interface clock
generator
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Four external vectored
interrupts
Two quasi-interrupts
Bit Sequential Carrier
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Supports 16-bit serial data
transfer in arbitrary format
Memory-Mapped I/O Structure
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Data memory bank 15
Comparator
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Two-channel mode: internal
reference (4-bit resolution)
One-channel mode: external
reference
Watch Timer
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Time interval generation:
0.5 s, 3.9 ms at 32768 Hz
Four frequency outputs to
BUZ pin
Clock source generation for
LCD
Two Power-Down Modes
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Idle mode (only CPU clock
stops)
Stop mode (main system
oscillation stops)
LCD Controller/Driver
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40 segments and 8 common
terminals
3, 4 and 8 common
selectable
Internal resistor circuit for
LCD bias
All dot can be switched
on/off
8-Bit Serial I/O Interface
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8-bit transmit/receive mode
8-bit receive only mode
LSB-first or MSB-first
transmission selectable
Internal or external clock
source
Oscillation Sources
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Crystal, ceramic, or RC for
main system clock
Crystal oscillator for
subsystem clock
Main system clock
frequency: 4.19 MHz
(typical)
Subsystem clock frequency:
32.768 kHz
CPU clock divider circuit (by
4, 8, or 64)
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8-Bit Basic Timer
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4 interval timer functions
Interrupts
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Three internal vectored
interrupts
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4鈥?

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