The M29F200B is a 2 Mbit (256Kb x8 or 128Kb x16) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single 5V supply. On power-up the memory defaults to its Read mode where it can be read in the same way as a ROM or EPROM. The M29F200B is fully backward compatible with the M29F200.
The memory is divided into blocks that can be erased independently so it is possible to preserve valid data while old data is erased. Each block can be protected independently to prevent accidental Program or Erase commands from modifying the memory. Program and Erase commands are written to the Command Interface of the memory. An on-chip Program/Erase Controller simplifies the process of programming or erasing the memory by taking care of all of the special operations that are required to update the memory contents. The end of a program or erase operation can be detected and any error conditions identified. The command set required to control the memory is consistent with JEDEC standards.
The blocks in the memory are asymmetrically arranged, see Table 19 and Table 20, Block Addresses. The first or last 64 KBytes have been divided into four additional blocks. The 16 KByte Boot Block can be used for small initialization code to start the microprocessor, the two 8 KByte Parameter Blocks can be used for parameter storage and the remaining 32K is a small Main Block where the application may be stored.
Chip Enable, Output Enable and Write Enable signals control the bus operation of the memory. They allow simple connection to most microprocessors, often without additional logic. The memory is offered in TSOP48 (12 x 20mm) and SO44 packages and it is supplied with all the bits erased (set to ’1’). In order to meet environmental requirements, ST offers the M29F200B in ECOPACK® packages.
ECOPACK packages are Lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Features
■ Single 5V±10% supply voltage for Program, Erase and Read operations
■ Access time: 45, 50, 70, 90ns
■ Programming time
– 8µs per Byte/Word typical
■ 7 memory blocks
– 1 Boot Block (Top or Bottom location)
– 2 parameter and 4 main blocks
■ Program/Erase controller
– Embedded Byte/Word Program algorithm
– Embedded Multi-Block/Chip Erase algorithm
– Status Register polling and toggle bits
– Ready/Busy output pin
■ Erase Suspend and Resume modes
– Read and Program another block during Erase Suspend
■ Unlock Bypass Program command
– Faster Production/Batch Programming
■ Temporary Block Unprotection mode
■ Low power consumption
– Standby and Automatic Standby
■ 100,000 Program/Erase cycles per block
■ 20 years data retention
– Defectivity below 1 ppm/year
■ Electronic Signature
– Manufacturer code: 0020h
– Top Device code M29F200BT: 00D3h
– Bottom Device code: M29F200BB: 00D4h
■ ECOPACK® packages available
(Picture:Pinout / Diagram)
