1. Overview

️· The Am29F016 is a flash memory chip designed for non-volatile storage. It retains data even when power is removed.
️· It uses a command register system to control its functions, like erasing, programming, and reading.
️· Incorrect command sequences will reset the chip to read mode.

2. Key Features

️· Non-Volatile Storage: Retains data without power.
️· Command Register: Controls operations through sequences of commands.
️· Sector Group Protection: Hardware-based protection to prevent accidental programming/erasing of specific memory regions.
️· Temporary Sector Group Unprotect: Allows brief unprotection of previously protected sectors.
️· Autoselect: A mode to determine which sectors are protected (using a read command at a specific address).

3. Addressing and Organization

️· The chip is divided into sectors, and those are grouped into sector groups. The number of sectors can be determined from a set of addresses.
️· Table 3: Sector Address Table defines the address ranges for each sector.
️· Table 4: Sector Group Addresses outlines the mapping of sector groups to their corresponding addresses.
️· Table 1: The chip has 32 sectors, which are organized into 8 sector groups.

4. Writing and Programming

️· Programming (writing data) and Erasing are accomplished through sequences of commands written to the command register.
️· Standard microprocessor write timing is used.
️· The sequence of commands is crucial; incorrect sequences reset the device.

5. Sector Group Protection (and Unprotection)

️· Hardware Protection: Allows disabling programming and erasing within designated groups of sectors. The device comes un-protected and can be programmed at the users site.
️· Autoselect Read: Can be used to determine if a sector group is protected (reading specific addresses).
️· Temporary Unprotection: By raising the RESET pin voltage to 12V, previously protected sector groups can be temporarily un-protected for modification. Returning the voltage restores the protection.

6. Commands

️· All operations are controlled by writing specific address and data values to the command register.
️· Table 5: (Not provided here, but would list the command sequences for erase, program, read, and other operations)

Tables from Document

1. Table 3: Sector Address Table - Defines address ranges for each sector.
2. Table 4: Sector Group Addresses - Maps sector groups to addresses.
3. Table 1: Defines the number of sectors, which is 32.
4. Table 5: Command Sequences - Lists the specific commands and their sequences for various operations.

Important Notes:

️· This is a technical summary; detailed operation requires consulting the full datasheet.
️· The specific command sequences and timings are critical for proper device operation.
️· AMD's ExpressFlash™ service is an option for factory programming and sector group protection.