M51231P I/O Controller 5V IC DIP-16

Description

M51231P I/O Controller 5V IC DIP-16 The M512x series, including the M5123/Phoenix KBC version marked as M51231P, is a highly integrated single-chip Mega I/O Controller from Acer Laboratories designed for IBM PC/XT/AT compatible desktop and notebook systems. It combines a 2.88 MB Floppy Disk Controller (compatible with 82077), two 16550 UARTs with 16-byte FIFOs and Infra-Red (IR) capability, an enhanced parallel port supporting SPP/PS/2/EPP/ECP/1284 modes, a built-in keyboard controller with PS/2 mouse interface, and a real-time clock, drastically reducing component count and board space while providing full Plug & Play configuration for Windows 95. Featuring 22 general-purpose I/O pins (including 5 alternative-function pins for remote control), high ESD protection (>4 kV), power management for all major blocks, fast Gate A20/RC support, and individual enable/disable of KBC/RTC functions, the M51231P offers flexible BIOS-level configuration via standard PnP registers. Its mirror-image pinout, XD-to-SD bus buffering, and additional IR pins make it an ideal cost-effective solution for legacy PC designs requiring complete peripheral integration in a compact footprint. Features: Supports Windows 95 Plug and Play. Supports 2 serial / 1 parallel / FDC / RTC / KB / PS/2 mouse functions. Supports 22 General Purpose I/O pins (3 GPIO ports + 5 ALT pins for remote control + 2 chip select pins). Enhanced ESD/LATCH protection up to over 4 kV / 300 mA. Supports SPP, PS/2, EPP, ECP and 1284 compliance for parallel port. Supports IR via UART1, UART2 and two additional dedicated IR pins. Supports Fast Gate A20 and RC functions. Supports KBC and RTC enable/disable functions. Single-chip Notebook/Desktop solution. 2.88 MB Floppy Disk Controller with 16-byte FIFOs and high-performance data separator. High-performance power management for FDC, UARTs and parallel port. Supports XD-To-SD Bus Buffer and Control Pins. Supports Phoenix KBC (M5123) firmware. Specifications: Parameter Value Model M51231P Package Type DIP-16 Function Touch control / channel selector Supply Voltage 5V (typical) Technology Linear / Analog IC Application Type TV tuner / control circuits Pinout: Pin No. Pin Name Description 1 VCC Power supply 2 GND Ground 3 OSC Oscillator connection 4 SYNC IN Synchronization input 5 TOUCH IN1 Touch input channel 1 6 TOUCH IN2 Touch input channel 2 7 TOUCH IN3 Touch input channel 3 8 TOUCH IN4 Touch input channel 4 9 UP/DOWN Channel control input 10 OUTPUT1 Channel output 1 11 OUTPUT2 Channel output 2 12 OUTPUT3 Channel output 3 13 OUTPUT4 Channel output 4 14 DISPLAY Display drive output 15 FEEDBACK Feedback control 16 MODE SELECT Mode selection / configuration Applications: CRT television channel selection systems. TV tuner control circuits. Consumer electronics control panels. Audio/video equipment control. Educational and repair electronics. Packages: 1x M51231P I/O Controller 5V IC DIP-16. documents: M51231P Datasheet.

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