Details, datasheet, quote on part number: TSC80C31-44MH/883
DescriptionCMOS Single-chip 8 Bit Microcontroller, External ROM, 128 Bytes of RAM, 32 I/o Lines, 16 Bit Timers, 12 MHZ
CompanyATMEL Corporation
DatasheetDownload TSC80C31-44MH/883 datasheet


Features, Applications

TS80C31X2 is high performance CMOS and ROMless versions of the 80C51 CMOS single chip 8-bit microcontroller. The TS80C31X2 retains all features of the TSC80C31 with 128 bytes of internal RAM, 5-source, 4 priority level interrupt system, an on-chip oscilator and two timer/ counters. In addition, the TS80C31X2 has a dual data pointer, a more versatile serial channel that facilitates multiprocessor communication (EUART) and a X2 speed improvement mechanism. The fully static design of the TS80C31X2 allows to reduce system power consumption by bringing the clock frequency down to any value, even DC, without loss of data. The TS80C31X2 has 2 software-selectable modes of reduced activity for further reduction in power consumption. In the idle mode the CPU is frozen while the timers, the serial port and the interrupt system are still operating. In the power-down mode the RAM is saved and all other functions are inoperative.

80C31 Compatible 8031 pin and instruction compatible Four 8-bit I/O ports Two 16-bit timer/counters 128 bytes scratchpad RAM

Interrupt Structure with 5 Interrupt sources, 4 priority level interrupt system
Full duplex Enhanced UART Framing error detection Automatic address recognition

High-Speed Architecture 40 MHz 3V X2 Speed Improvement capability (6 clocks/ machine cycle) 30 MHz 5V, 20 MHz @ 3V (Equivalent to 60 MHz 5V, 40 MHz @ 3V)

Power Control modes Idle mode Power-down mode Power-off Flag
Dual Data Pointer Asynchronous port reset

Once mode (On-chip Emulation) Power supply: 4.5-5.5V, 2.7-5.5V Temperature ranges: Commercial to 70oC) and Industrial to 85oC) Packages: VQFP44 1.4, PQFP F1 (13.9 footprint)

RxD XTAL1 XTAL2 ALE/ PROG PSEN CPU WR (1) Timer 0 Timer 1 INT Ctrl Parallel I/O Ports & Ext. Bus Port 0 Port 1 Port 2 Port 3 EUART RAM 128x8 TxD

The Special Function Registers (SFRs) of the TS80C31X2 fall into the following categories: C51 core registers: ACC, B, DPH, DPL, PSW, SP, AUXR1 I/O port registers: P2, P3 Timer registers: TCON, TH0, TH1, TMOD, TL0, TL1 Serial I/O port registers: SADDR, SADEN, SBUF, SCON Power and clock control registers: PCON Interrupt system registers: IE, IP, IPH Others: CKCON Table 1. All SFRs with their address and their reset value Bit addressable


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