描述 Description

CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR TELEVISIONDescription
The HMS81C4x60 is an advanced CMOS 8-bit microcontroller with 60K bytes of ROM. This is one of the HMS800 family. This is a powerful microcontroller which provides a high flexibility and cost effective solution to many TV applications. The HMS81C4x60 provides following standard features: 60K bytes of ROM, 1024 bytes of RAM, 8/16-bit timer/counter, on chip PLL oscillator and clock circuitry. In addition, there are other package types, HMS81C4360(32PDIP), HMS81C4360SK(32SKDIP), HMS81C4460(42SDIP).
This document is explained for the base of HMS81C4x60, the eliminated functions are same as below.

特性 Features

? 60K Bytes of On-chip Program Memory
? 1024 Bytes of On-chip Data RAM
? Minimum Instruction Cycle Time
- 256ns (NOP operation)
? PLL Oscillator for OSD and System Clock
- External 4MHz Crystal Input
? 31 Programmable I/O pins
- 26 Input/Output and 5 Input pins
? I2C Bus Interface
- Multimaster (2 Pairs interface pins)
? A/D Converter
- 8-bit × 5 ch
? Pulse Width Modulation
- 14-bit × 1 ch
- 8-bit × 5 ch
? Timer
- Timer/Counter : 8-bit × 4ch(16-bit × 2 ch)
- Basic interval timer
- Watch Dog Timer
? Number of Interrupt Source
- 16 Interrupts
- 3 External Interrupts
? On Screen Display
- 512 character fonts pattern
- Character Size : 1.0, 1.5, 2.0 times
- Character Pixel size : 12 × 10, 12 × 12, 12 × 14, 12 × 16, 16 × 18
- Display Capability : 48 Characters ×16 Lines
- Character, Background color : 512 colors, 8 pallet
- Special functions : Rounding, Outline, Shadow, Underline, Double scanned line OSD
? Buzzer Driving Port
- 500Hz ~ 250KHz @4MHz (Duty 50%)
? Vertical Blanking Interveral Information cap ture for EIA-608(Closed Caption) or VPS, etc