PRODUCT DESCRIPTION
The SST89E516RDx and SST89V516RDx are members of the FlashFlex family of 8-bit microcontroller products designed and manufactured with SST’s patented and proprietary SuperFlash CMOS semiconductor process technology. The split-gate cell design and thick-oxide tunneling injector offer significant cost and reliability benefits for SST’s customers. The devices use the 8051 instruction set and are pin-for-pin compatible with standard 8051 microcontroller devices.
The devices come with 72 KByte of on-chip flash EEPROM program memory which is partitioned into 2 independent program memory blocks. The primary Block 0 occupies 64 KByte of internal program memory space and the secondary Block 1 occupies 8 KByte of internal program memory space.
The 8-KByte secondary block can be mapped to the lowest location of the 64 KByte address space; it can also be hidden from the program counter and used as an independent EEPROM-like data memory.
In addition to the 72 KByte of EEPROM program memory on-chip and 1024 x8 bits of on-chip RAM, the devices can address up to 64 KByte of external program memory andup to 64 KByte of external RAM.
The flash memory blocks can be programmed via a standard 87C5x OTP EPROM programmer fitted with a special adapter and the firmware for SST’s devices. During power on reset, the devices can be configured as either a slave to an external host for source code storage or a master to an external host for an in-application programming (IAP) operation. The devices are designed to be programmed in-system and in-application on the printed circuit board for maximum flexibility. The devices are pre-programmed with an example of the bootstrap loader in the memory, demon strating the initial user program code loading or subsequent user code updating via the IAP operation. The sample bootstrap loader is available for the user’s reference and convenience only; SST does not guarantee its functionality or usefulness. Chip-Erase or Block-Erase operations will erase the pre-programmed sample code.

FEATURES:
• 8-bit 8051-Compatible Microcontroller (MCU)
   with Embedded SuperFlash Memory
   – Fully Software Compatible
   – Development Toolset Compatible
   – Pin-For-Pin Package Compatible
• SST89E516RD2 Operation
   – 0 to 40 MHz at 5V
• SST89V516RD2 Operation
   – 0 to 33 MHz at 3V
• 1 KByte Internal RAM
• Dual Block SuperFlash EEPROM
   – 64 KByte primary block +
      8 KByte secondary block
      (128-Byte sector size for both blocks)
   – Individual Block Security Lock with SoftLock
   – Concurrent Operation during
In-Application Programming (IAP)
   – Memory Overlay for Interrupt Support during IAP
• Support External Address Range up to 64
   KByte of Program and Data Memory
• Three High-Current Drive Ports (16 mA each)
• Three 16-bit Timers/Counters
• Full-Duplex, Enhanced UART
   – Framing Error Detection
   – Automatic Address Recognition
• Ten Interrupt Sources at 4 Priority Levels
   – Four External Interrupt Inputs
• Programmable Watchdog Timer (WDT)
• Programmable Counter Array (PCA)
• Four 8-bit I/O Ports (32 I/O Pins) and
   One 4-bit Port
• Second DPTR register
• Low EMI Mode (Inhibit ALE)
• SPI Serial Interface
• Standard 12 Clocks per cycle, the device has an
   option to double the speed to 6 clocks per cycle.
• TTL- and CMOS-Compatible Logic Levels
• Brown-out Detection
• Low Power Modes
   – Power-down Mode with External Interrupt Wake-up
   – Idle Mode
• Temperature Ranges:
   – Commercial (0°C to +70°C)
   – Industrial (-40°C to +85°C)
• Packages Available
   – 40-contact WQFN (Port 4 feature not available)
   – 44-lead PLCC
   – 40-pin PDIP (Port 4 feature not available)
   – 44-lead TQFP
• All non-Pb (lead-free) devices are RoHS compliant