SST89C59

SST89C54, SST89C58 and SST89C59 are members of the FlashFlex51 family of 8-bit microcontrollers. The FlashFlex51 family is a family of embedded microcontroller products designed and manufactured on the state-of-the-art SuperFlash CMOS semiconductor process technology.

As a member of the FlashFlex51 controller family, the SST89C54/58/59 uses the same powerful instruction set, has the same architecture, and is pin-for-pin compatible with standard 8xC5x microcontroller devices.

SST89C54/58/SST89C59 comes with 20/36/64 KByte of integrated on-chip flash EEPROM program memory
using the patented and proprietary Silicon Storage Technology, Inc. (SST) CMOS SuperFlash EEPROM technology with the SST field enhancing tunneling injector split-gate memory cells. The SuperFlash memory is partitioned into 2 independent program memory blocks. The lower 16/32/60 KByte SuperFlash block occupies the standard 8xC54/58/SST89C59's 16/32/60KByte of internal ROM space and the upper 4 KByte SuperFlash block occupies the upper most of the 64 KByte address space for the 8xC5x architecture. The flash memory blocks can be programmed via a standard 87C5x OTP EPROM programmer or a standard flash EEPROM memory programmer fitted with a special adapter and firmware for SST89C54/58/59 devices. During the power-on reset, the SST89C54/58/59 can be configured as a master to a source code storage or as a slave to an external host for In-System-Programming(ISP) operation. SST89C54/58/59 is designed to be programmed "in-place" and "in-field" on the printed circuit board (PCB) assembly for maximum flexibility.

The highly reliable, patented SuperFlash technology and memory cell have a number of important advantages for designing and manufacturing flash EEPROMs, when compared with the thin oxide stacked gate or two transistor approaches. These advantages translate into significant cost and reliability benefits for our customers.

In addition to 20/36/64 KByte of SuperFlash EEPROM program memory on-chip, the SST89C54/58/59 can address up to 64 KByte of program memory external to the chip. The SST89C54/58/SST89C59 microcontrollers have 256 x 8 bits of on-chip RAM. Up to 64 KByte of external data memory (RAM) can be addressed.