T85C5121

Features:

• 80C51 Core
     12 or 6 Clocks per Instruction (X1 and X2 Modes)
     256 Bytes Scratchpad RAM
     Dual Data Pointer
     Two 16-bit Timer/Counters: T0 and T1
• T83C5121 with 16 Kbytes Mask ROM
• T85C5121 with 16 Kbytes Code RAM
• T89C5121 with 16 Kbytes Code RAM and 16 Kbytes EEPROM
• On-chip Expanded RAM (XRAM): 256 Bytes
• Versatile Host Serial Interface
     Full-duplex Enhanced UART (EUART) with Dedicated Baud Rate Generator (BRG):
          Most Standard Speeds up to 230K bits/s at 7.36 MHz
      Output Enable Input
     Multiple Logic Level Shifters Options (1.8V to V_CC)
     Automatic Level Shifter Option
• Multi-protocol Smart Card Interface
     Certified with Dedicated Firmware According to ISO 7816, EMV2000, GIE-CB, GSM
          11.12V and WHQL Standards
     Asynchronous Protocols T = 0 and T = 1 with Direct and Inverse Modes
     Baud Rate Generator Supporting All ISO7816 Speeds up to D = 32/F = 372
     Parity Error Detection and Indication
     Automatic Character Repetition on Parity Errors
     Programmable Timeout Detection
     Card Clock Stop High or Low for Card Power-down Mode
      Support Synchronous Card with C4 and C8 Programmable Outputs
     Card Detection and Automatic De-activation Sequence
     Step-up/down Converter with Programmable Voltage Output: 5V, 3V (± 8% at 60 mA) and 1.8V (±8% at 20 mA)
     Direct Connection to Smart Card Terminals:
           Short Circuit Current Limitation
           Logic Level Shifters
           4 kV ESD Protection (MIL/STD 833 Class 3)
• Alternate Card Support with CLK, I/O and RST According to GSM 11.12V Standard
• 2x I/O Ports: 6 I/O Port1 and 8 I/O Port3
• 2x LED Outputs with Programmable Current Sources: 2, 4, or 10 mA
• Hardware Watchdog
• Reset Output Includes
      Hardware Watchdog Reset
     Power-on Reset (POR)
     Power-fail Detector (PFD)
• 4-level Priority Interrupt System with 7 Sources
• 7.36 to 16 MHz On-chip Oscillator with Clock Prescaler
• Absolute CPU Maximal Frequency: 16 MHz in X1 mode, 8MHz in X2 mode
• Idle and Power-down Modes
• Voltage Operation: 2.85V to 5.4V
• Low Power Consumption
     8 mA Operating Current (at 5.4V and 3.68 MHz)
      150 mA Maximum Current with Smart Card Power-on (at 16 MHz X1 Mode)
     30 A Maximum Power-down Current at 3.0V (without Smart Card)
     100 A Maximum Power-down Current at 5.4V (without Smart Card)
• Temperature Range
      Commercial: 0 to +70°C Operating Temperature
     Industrial: -40 to +85°C Operating Temperature
• Packages
     SSOP24
     PLCC52


Pinout




Specifications

Ambiant Temperature Under Bias ................-25°C to 85°C
Storage Temperature ............................ -65°C to + 150°C
Voltage on V_CC to V_SS...................................-0.5V to + 6.0V
Voltage on Any Pin to V_SS...................... -0.5V to V_CC + 0.5V


Description

T85C5121 is a high performance CMOS ROM/CRAM derivative of the 80C51 CMOS single chip 8-bit microcontrollers.

T8xC5121 retains the features of the Atmel 80C51 with extended ROM capacity (16 Kbytes), 512 bytes of internal RAM, a 4-level interrupt system, two 16-bit timer/counters (T0/T1), a full duplex enhanced UART (EUART) with baud rate generator (BRG) and an on-chip oscillator.

In addition, the T8xC5121 have, a Multi protocol Smart Card Interface, a dual data pointer, 2 programmable LED current sources (2-4-10 mA) and a hardware Watchdog. T89C5121 Flash RAM version and T85C5121 Code RAM version can be loaded by In- System Programming (ISP) software residing in the on-chip ROM from a low-cost external serial EEPROM or from R232 interface.

T85C5121 have 2 software-selectable modes of reduced activity for further reduction in power consumption.