8-Bit CMOS Flash Based Microcontroller with 32k Memory, Virtual
EEPROM and Brownout
General Description
The COP8SBR9/SCR9/SDR9 Flash based microcontrollers are highly
integrated COP8™ Feature core devices, with 32k Flash memory and
advanced features including Virtual EEPROM, High Speed Timers,
USART, and Brownout Reset. This single-chip CMOS device is suited
for applications requiring a full featured, in-system
reprogrammable controller with large memory and low EMI. The same
device is used for development, pre-production and volume
production with a range of COP8 software and hardware development
tools.
KEY FEATURES
►32 kbytes Flash Program Memory with Security Feature
► Virtual EEPROM using Flash Program Memory
►1 kbyte volatile RAM
►USART with on chip baud generator
► 2.7V–5.5V In-System Programmability of Flash
► High endurance - 100k Read/Write Cycles
►Superior data retention - 100 years
►Dual Clock Operation with HALT/IDLE Power Save Modes
Block Diagram
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, please
contact the National Semiconductor Sales Office/ Distributors for
availability and specifications.
Supply Voltage (VCC) 7V
Voltage at Any Pin −0.3V to VCC +0.3V
Total Current into VCC Pin (Source) 200 mA
Total Current out of GND Pin (Sink) 200 mA
Storage Temperature Range −65˚C to +140˚C
ESD Protection Level 2 kV (Human Body Model)
FUNCTIONAL DESCRIPTION
The organization of the ISP feature consists of the user flash
program memory, the factory boot ROM, and some registers dedicated
to performing the ISP function. See Figure 13 for a simplified
block diagram. The factory installed ISP that uses MICROWIRE/PLUS
is located in the Boot ROM. The size of the Boot ROM is 1K bytes
and also contains code to facilitate in system emulation
capability. If a user chooses to write his own ISP routine, it must
be located in the flash program memory
