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AB28F200BR-T80 Datasheet(PDF) 5 Page - Intel Corporation |
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AB28F200BR-T80 Datasheet(HTML) 5 Page - Intel Corporation |
5 / 36 page E A28F200BR 5 ADVANCE INFORMATION 1.0 PRODUCT FAMILY OVERVIEW This datasheet contains the specifications for the automotive version of the 28F200BR family of boot block flash memory devices. This device continues to offer the same functionality as earlier “BX” devices but adds the capability of performing program and erase operations with a 5V or 12V VPP. The A28F200BR automatically senses which voltage is applied to the VPP pin and adjusts its operation accordingly. 1.1 New Features in the SmartVoltage Products The new SmartVoltage boot block flash memory family offers identical operation as the current BX/BL 12V program products, except for the differences listed below. All other functions are equivalent to current products, including signatures, write commands, and pinouts. • WP# pin has replaced a DU pin. See Table 1 for details. • 5V program/erase operation has been added that uses proven program and erase techniques with 5V ± 10% applied to VPP. If you are designing with existing BX 12V VPP boot block products today, you should provide the capability in your board design to upgrade to these new SmartVoltage products. Follow these guidelines to ensure compatibilty: 1. Connect WP# (DU on existing products) to a control signal, VCC or GND. 2. If adding a switch on VPP for write protection, switch to GND for complete write protection. 3. Allow for connecting 5V to VPP instead of 12V, if desired. 1.2 Main Features Intel’s SmartVoltage technology provides the most flexible voltage solution in the industry. SmartVoltage provides two discrete voltage supply pins, VCC for read operation, and VPP for program and erase operation. Discrete supply pins allow system designers to use the optimal voltage levels for their design. For program and erase operations, 5V VPP operation eliminates the need for in system voltage converters, while 12V VPP operation provides faster program and erase for situations where 12V is available, such as manufacturing or designs where 12V is already available. The 28F200 boot block flash memory family is a very high-performance, 2-Mbit (2,097,152 bit) flash memory family organized as either 256 Kwords (131,072 words) of 16 bits each or 512 Kbytes (262,144 bytes) of 8 bits each. Separately erasable blocks, including a hardware- lockable boot block (16,384 bytes), two parameter blocks (8,192 Bytes each) and main blocks (one block of 98,304 bytes and one block of 131,072 bytes) define the boot block flash family architecture. See Figure 3 for memory maps. Each parameter block can be independently erased and programmed 10,000 times. Each main block can be erased 1,000 times. The boot block is located at either the top (denoted by -T suffix) or the bottom (-B suffix) of the address map in order to accommodate different microprocessor protocols for boot code location. The hardware-lockable boot block provides complete code security for the kernel code required for system initialization. Locking and unlocking of the boot block is controlled by WP# and/or RP# (see Section 3.4 for details). The Command User Interface (CUI) serves as the interface between the microprocessor or microcontroller and the internal operation of the boot block flash memory products. The internal Write State Machine (WSM) automatically executes the algorithms and timings necessary for program and erase operations, including verifications, thereby unburdening the microprocessor or microcontroller of these tasks. The Status Register (SR) indicates the status of the WSM and whether it successfully completed the desired program or erase operation. Program and erase automation allows program and erase operations to be executed using an industry-standard two-write command sequence to the CUI. Data writes are performed in word or byte increments. Each byte or word in the flash memory can be programmed independently of other memory locations, unlike erases, which erase all locations within a block simultaneously. The 4-Mbit SmartVoltage boot block flash memory family is also designed with an Automatic Power |
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