SUMMARY DESCRIPTION
The PSD8XXFX family of memory systems for microcontrollers (MCUs) brings In-System-Programmability (ISP) to Flash memory and programmable logic. The result is a simple and flexible solution for embedded designs. PSD devices combine many of the peripheral functions found in MCU based applications.

FEATURES SUMMARY
■ FLASH IN-SYSTEM PROGRAMMABLE (ISP)
   PERIPHERAL FOR 8-BIT MCUS
■ DUAL BANK FLASH MEMORIES
   – UP TO 2 Mbit OF PRIMARY FLASH
      MEMORY (8 Uniform Sectors, 32K x8)
   – UP TO 256 Kbit SECONDARY FLASH
      MEMORY (4 Uniform Sectors)
   – Concurrent operation: READ from one
      memory while erasing and writing the
      other
■ UP TO 256 Kbit BATTERY-BACKED SRAM
■ 27 RECONFIGURABLE I/O PORTS
■ ENHANCED JTAG SERIAL PORT
■ PLD WITH MACROCELLS
   – Over 3000 Gates of PLD: CPLD and DPLD
   – CPLD with 16 Output Macrocells (OMCs)
      and 24 Input Macrocells (IMCs)
   – DPLD - user defined internal chip select decoding
■ 27 INDIVIDUALLY CONFIGURABLE I/O PORT PINS
   The can be used for the following functions:
   – MCU I/Os
   – PLD I/Os
   – Latched MCU address output
   – Special function I/Os.
   – 16 of the I/O ports may be configured as
      open-drain outputs.
■ IN-SYSTEM PROGRAMMING (ISP) WITH JTAG
   – Built-in JTAG compliant serial port allows
      full-chip In-System Programmability
   – Efficient manufacturing allow easy
      product testing and programming
   – Use low cost FlashLINK cable with PC
■ PAGE REGISTER
   – Internal page register that can be used to
      expand the microcontroller address space
      by a factor of 256
■ PROGRAMMABLE POWER MANAGEMENT
■ HIGH ENDURANCE:
   – 100,000 Erase/WRITE Cycles of Flash Memory
   – 1,000 Erase/WRITE Cycles of PLD
   – 15 Year Data Retention
■ 5V±10% SINGLE SUPPLY VOLTAGE
■ STANDBY CURRENT AS LOW AS 50µA