T89C5121 Datasheet | Atmel

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 m A) and 1.8V (±8% at 20 m A) - Direct Connection to Smart Card Terminals: .. Short Circuit Current Limitation Logic Level Shifters 4 k V 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 m A 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 m A...