S3C7238/P7238/C7235/P7235 is a single-chip CMOS microcontroller designed by Samsung based on SAM47 (Samsung Arrangeable Microcontrollers) core. It has features such as LCD direct drive capability, 8-bit timer/counter, and serial I/O.
The S3C7238, S3C7235, P7238 and P7235 are single‑chip CMOS microcontrollers built around Samsung's newest 4‑bit CPU core, SAM47. They offer LCD direct‑drive capability, 8‑bit timers, serial I/O and up to 40 I/O pins in an 80‑pin QFP package, making them suitable for applications requiring integrated LCD functions.
Key features include 512 × 4‑bit RAM, 8 KB or 16 KB ROM depending on the model, multiple power‑down modes, a variety of oscillation sources, and extensive interrupt options. The devices operate from 1.8 V to 5.5 V and across –40 °C to 85 °C, with a typical main system clock of 4.19 MHz and a 32.768 kHz subsystem clock.
| CPU core | 4‑bit SAM47 |
|---|---|
| RAM | 512 × 4‑bit |
| ROM (S3C7238/P7238) | 8 KB × 8‑bit |
| ROM (S3C7235/P7235) | 16 KB × 8‑bit |
| LCD direct‑drive capability | Maximum 16‑digit |
| I/O pins (dedicated) | Up to 40 pins |
| Package type | 80‑pin QFP |
| Operating voltage range | 1.8 V to 5.5 V |
| Operating temperature range | -40 °C to 85 °C |
| Main system clock (typical) | 4.19 MHz |
| Subsystem clock | 32.768 kHz |
They use Samsung's newest 4‑bit CPU core called SAM47.
Up to 40 of the 80 pins can be dedicated to I/O functions.
They operate from 1.8 V up to 5.5 V.
It can directly drive up to 16 digits with 32 segment and 4 common pins.