FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
FEATURES:
•
Multi-Purpose 8-bit 8051 Family Compatible
Microcontroller Unit (MCU) with Embedded
SuperFlash Memory
Fully Software and Development Toolset
Compatible as well as Pin-For-Pin Package
Compatible with Standard 8xC5x
Microcontrollers
256 Bytes Register/Data RAM
20/36 KByte Embedded High Performance
Flexible SuperFlash EEPROM
– 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
Support External Address Range up to
64 KByte of Program and Data Memory
• High Current Drive on Port 1 (5, 6, 7) pins
• Three 16-bit Timer/Counter
• 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)
• TTL- and CMOS-Compatible Logic Levels
• Extended Power-Saving Modes
– Idle Mode
– Power Down Mode with External Interrupt
Wake-up
– Standby (Stop Clock) Mode
• 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:
– Commercial (0°C to +70°C)
– Industrial (-40°C to +85°C)
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.
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.
The highly reliable, patented SuperFlash technology and
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.
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PRODUCT DESCRIPTION
SST89C54 and SST89C58 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 uses the same powerful instruction set,
has the same architecture, and is pin-for-pin compatible
with standard 8xC5x microcontroller devices.
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-
pies 16/32 KByte of internal program memory space and
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
© 2000 Silicon Storage Technology, Inc.
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The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc. FlashFlex, In-Application Programming, IAP and SoftLock are
trademarks of Silicon Storage Technology, Inc. These specifications are subject to change without notice.
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FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
TABLE OF CONTENTS
PRODUCT FEATURES ......................................................................................................................................... 1
PRODUCT DESCRIPTION .................................................................................................................................... 1
FUNCTIONAL BLOCKS ......................................................................................................................................... 4
Functional Block Diagram ............................................................................................................................... 4
PIN ASSIGNMENTS .............................................................................................................................................. 5
Pin Descriptions .............................................................................................................................................. 6
MEMORY ORGANIZATION ................................................................................................................................... 8
Program Memory ............................................................................................................................................ 8
Memory Re-Mapping ..................................................................................................................................... 10
Activation and Deactivation of Memory Re-Mapping ...............................................................................
11
Data Memory ................................................................................................................................................ 13
Special Function Registers (SFR) ................................................................................................................. 13
CPU Related SFRs ..................................................................................................................................
13
Flash Memory Programming SFRs ..........................................................................................................
14
Watchdog Timer SFRs ............................................................................................................................
17
Timer/Counters SFRs ..............................................................................................................................
18
Interface SFRs .........................................................................................................................................
18
FLASH MEMORY PROGRAMMING .................................................................................................................... 18
External Host Programming Mode ................................................................................................................ 18
Product Identification ............................................................................................................................... 20
External Host Mode Commands .............................................................................................................. 20
External Host Mode Clock Source ........................................................................................................... 21
Arming Command .................................................................................................................................... 21
Programming a SST89C54/58 ................................................................................................................. 21
Flash Operation Status Detection (Ext. Host Handshake) ....................................................................... 22
In-Application Programming Mode ................................................................................................................ 26
In-Application Programming Mode Clock Source ..................................................................................... 26
IAP Enable Bit ......................................................................................................................................... 26
In-Application Programming Mode Commands ........................................................................................ 26
Polling ...................................................................................................................................................... 29
Interrupt Temination ................................................................................................................................. 30
TIMERS/COUNTERS ........................................................................................................................................... 31
© 2000 Silicon Storage Technology, Inc.
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FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
SERIAL I/O (UART) .............................................................................................................................................. 31
WATCHDOG TIMER ............................................................................................................................................ 32
SECURITY LOCK ................................................................................................................................................ 32
Hard Lock .................................................................................................................................................
32
SoftLock ...................................................................................................................................................
32
Status of the Security Lock ........................................................................................................................... 33
RESET ................................................................................................................................................................ 34
Power-On Reset ........................................................................................................................................... 34
POWER-SAVING MODES ................................................................................................................................... 35
CLOCK INPUT OPTIONS .................................................................................................................................... 37
ELECTRICAL SPECIFICATION ........................................................................................................................... 38
Absolute Maximum Ratings .......................................................................................................................... 38
Operation Range ........................................................................................................................................... 38
Reliability Characteristics .............................................................................................................................. 38
DC Electrical Characteristics ......................................................................................................................... 39
AC Electrical Characteristics ......................................................................................................................... 42
Explanation Of Symbols ..........................................................................................................................
43
External Clock Drive ................................................................................................................................
44
Serial Port Timing - Shift Register Mode ..................................................................................................
45
PRODUCT ORDERING INFORMATION ............................................................................................................. 46
Part Number Valid Combinations .................................................................................................................. 46
PART NUMBER CROSS REFERENCE GUIDE .................................................................................................. 47
PACKAGING DIAGRAMS .................................................................................................................................... 48
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© 2000 Silicon Storage Technology, Inc.
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