S3C7044/C7048 is a single-chip CMOS microcontroller produced by Samsung (SAMSUNG). It uses 4-bit CPU core SAM47 and has two 8-bit timers/counters, an 8-bit serial I/O interface and eight software n-channel open-drain I/O pins. S3C7044/C7048 can provide an excellent design solution for a variety of general-purpose applications.
This handbook describes the Samsung S3C7044, S3C7048 and S3C7048P single‑chip CMOS microcontrollers. It outlines the core SAM47 CPU, memory organization, I/O capabilities, power‑down modes, and peripheral functions such as timers, serial I/O, and interrupt handling. The document includes block diagrams, pin‑assignment tables, and programming guidelines.
Key sections cover the CPU registers, program and data memory structures, clock circuitry, power‑down operation, and detailed specifications like operating voltage, temperature range, and package options. The material is intended for engineers designing with these microcontrollers and for programmers needing register‑level details.
| RAM | 512 x 4‑bit |
|---|---|
| ROM (S3C7044) | 4096 x 8‑bit |
| ROM (S3C7048) | 8192 x 8‑bit |
| I/O Pins | 36 total (4 input, 24 configurable, 8 open‑drain) |
| Operating Voltage (Main) | 1.8 V to 5.5 V |
| Operating Voltage (OTP) | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to 85 °C |
| Oscillation Frequency | 0.4 MHz – 6.0 MHz |
| Package Types | 42‑pin SDIP, 44‑pin QFP |
| Timers | Two 8‑bit timer/counters, 8‑bit basic timer, watch timer |
| Serial I/O Interface | 8‑bit transmit/receive mode |
The main supply voltage ranges from 1.8 V to 5.5 V, and the OTP supply ranges from 2.0 V to 5.5 V.
The microcontroller provides 36 I/O pins: 4 input‑only, 24 configurable, and 8 software n‑channel open‑drain pins.
It includes two 8‑bit timer/counters, an 8‑bit basic interval timer, and a watch timer for real‑time measurement.
They are available in 42‑pin SDIP and 44‑pin QFP packages.