FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
FEATURES:
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High Current Drive on Port 1 (5, 6, 7) pins
Three 16-bit Timer/Counter
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Multi-Purpose 8-bit 8051 Family Compatible
Microcontroller Unit (MCU) with Embedded
SuperFlash Memory
1
Programmable Serial Port (UART)
Six Interrupt Sources at 2 Priority Levels
Selectable Watchdog Timer (WDT)
Four 8-bit I/O Ports (32 I/O Pins)
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Fully Software and Development Toolset
Compatible as well as Pin-For-Pin Package
Compatible with Standard 8xC5x
Microcontrollers
2
3
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256 Bytes Register/Data RAM
TTL- and CMOS-Compatible Logic Levels
Extended Power-Saving Modes
20/36 KByte Embedded High Performance
Flexible SuperFlash EEPROM
4
– Idle Mode
– Power Down Mode with External Interrupt
Wake-up
– One 16/32 KByte block (128-Byte
sector size)
– One 4 KByte block (64-Byte sector size)
– Individual Block Security Lock with Softlock™
feature
– 87C5x Programmer Compatible
– Concurrent Operation during In-Application
Programming™(IAP™)
– Memory Re-Mapping for Interrupt Support
during IAP
5
– Standby (Stop Clock) Mode
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High Speed Operation at 5 Volts (0 to 33MHz)
Low Voltage (2.7V) Operation (0 to 12MHz)
PDIP-40, PLCC-44 and TQFP-44 Packages
Temperature Ranges:
6
7
– Commercial (0°C to +70°C)
– Industrial (-40°C to +85°C)
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Support External Address Range up to
64 KByte of Program and Data Memory
8
PRODUCT DESCRIPTION
via a standard 87C5x OTP EPROM programmer fitted
with a special adapter and firmware for SST89C54/58
devices. During the power-on reset, the SST89C54/58
can be configured as a master for source code storage
or as a slave to an external host for In-Application
Programming (IAP) operation. SST89C54/58 is de-
signed to be programmed “In-System” and “In-Applica-
tion” on the printed circuit board for maximum flexibility.
The device is pre-programmed with a sample bootstrap
loader in the memory (see Note 1), demonstrating the
initial user program code loading or subsequent user
code updating via the “IAP” operation.
SST89C54 and SST89C58 are members of the
FlashFlex51 family of 8-bit microcontrollers. The
FlashFlex51 family is a family of embedded
microcontrollerproductsdesignedandmanufacturedon
the state-of-the-art SuperFlash CMOS semiconductor
process technology.
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As a member of the FlashFlex51 controller family, the
SST89C54/58 uses the same powerful instruction set,
has the same architecture, and is pin-for-pin compatible
with standard 8xC5x microcontroller devices.
In addition to 20/36 KByte of SuperFlash EEPROM
program memory on-chip, the SST89C54/58 can ad-
dress up to 64 KByte of program memory external to the
chip. The SST89C54/58 have 256 x 8 bits of on-chip
RAM. Up to 64 KByte of external data memory (RAM)
can be addressed.
SST89C54/58 comes with 20/36 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 primary SuperFlash Block 0 occu-
pies16/32KByteofinternalprogrammemoryspaceand
the secondary SuperFlash Block 1 occupies 4 KByte of
SST89C54/58’s internal program memory space. The 4
KByte secondary SuperFlash block can be mapped to
the highest or 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. The flash memory blocks can be programmed
Thehighlyreliable,patentedSuperFlashtechnologyand
memory cell architecture have a number of important
advantages for designing and manufacturing flash
EEPROMs, when compared with other approaches.
These advantages translate into significant cost and
reliability benefits for our customers.
Note 1: The sample bootstrap loader is for the user’s reference and
convenience only. SST does not guarantee the functionality
or the usefulness of the sample bootstrap loader. Chip-Erase
or Block-Erase operations will erase the pre-programmed
sample code.
© 2000 Silicon Storage Technology, Inc. The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc. FlashFlex, In-Application Programming, IAP and SoftLock are
344-2 8/00 trademarks of Silicon Storage Technology, Inc. These specifications are subject to change without notice.
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