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M28R400CB
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General Description

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MFG:N/A Package Cooled:BGA D/C:05+

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Part Number: M28R400CB

MFG: N/A

Package Cooled: BGA

D/C: 05+

Description: The M28R400C is a 4 Mbit (256Kbit x 16) non-volatile Flash memory that can be erased electrically at the block level an...

M28R400CB General Description

The M28R400C is a 4 Mbit (256Kbit x 16) non-volatile Flash memory that can be erased electrically at the block level and programmed in-system on a Word-by-Word basis. These operations can be performed using a single low voltage (1.65 to 2.2V) supply. VDDQ allows to drive the I/O pin down to 1.65V. An optional 12V VPP power supply is provided to speed up customer programming.

The device features an asymmetrical blocked architecture. The M28R400C has an array of 15 blocks: 8 Parameter Blocks of 4 KWord and 7 Main Blocks of 32 KWord. M28R400CT has the Parameter Blocks at the top of the memory address space while the M28R400CB locates the Parameter Blocks starting from the bottom. The memory maps are shown in Figure 4, Block Addresses.

The M28R400C features an instant, individual block locking scheme that allows any block to be locked or unlocked with no latency, enabling instant code and data protection. All blocks have three levels of protection. They can be locked and locked-down individually preventing any accidental programming or erasure. There is an additional hardware protection against program and block erase. When VPP £ VPPLK all blocks are protected against program or block erase. All blocks are locked at power-up.

Each block can be erased separately. Erase can be suspended in order to perform either read or program in any other block and then resumed. Program can be suspended to read data in any other block and then resumed. Each block can be programmed and erased over 100,000 cycles.

The device includes a 128 bit Protection Register and a Security Block to increase the protection of a system design. The Protection Register is divided into two 64 bit segments, the first one contains a unique device number written by ST, while the second one is one-time-programmable by the user. The user programmable segment can be permanently protected. The Security Block, parameter block 0, can be permanently protected by the user. Figure 5, shows the Security Block Memory Map.

Program and Erase commands are written to the Command Interface of the memory. An on-chip Program/Erase Controller takes care of the timings necessary for program and erase operations. 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 memory is offered in a TFBGA46 (0.75mm pitch) package and is supplied with all the bits erased (set to '1').

M28R400CB Maximum Ratings

Symbol	Parameter	Value		Unit
Symbol	Parameter	Min	Max	Unit
T_A	Ambient Operating Temperature ⁽¹⁾	40	85	°C
T_BIAS	Temperature Under Bias	40	125	°C
T_STG	Storage Temperature	55	155	°C
V_IO	Input or Output Voltage	0.5	V_DDQ + 0.5	V
V_DD, V_DDQ	Supply Voltage	0.5	2.7	V
V_PP	Program Voltage	0.5	13	V
t_VPPH	Time for VPP at VPPH		100	hours

M28R400CB Features

`SUPPLY VOLTAGE
VDD = 1.65V to 2.2V Core Power Supply
VDDQ= 1.65V to 2.2V for Input/Output
VPP = 12V for fast Program (optional)
`ACCESS TIMES: 90ns, 120ns
`PROGRAMMING TIME
10µs typical
Double Word Programming Option
`COMMON FLASH INTERFACE
64 bit Security Code
`MEMORY BLOCKS
Parameter Blocks (Top or Bottom location)
Main Blocks
`BLOCK LOCKING
All blocks locked at Power Up
Any combination of blocks can be locked
WP for Block Lock-Down
`SECURITY
64 bit user Programmable OTP cells
64 bit unique device identifier
One Parameter Block Permanently Lockable
`AUTOMATIC STAND-BY MODE
`PROGRAM and ERASE SUSPEND
`100,000 PROGRAM/ERASE CYCLES per BLOCK
`ELECTRONIC SIGNATURE
Manufacturer Code: 20h
Top Device Code, M28R400CT: 882Ah
Bottom Device Code, M28R400CB: 882Bh

M28R400CB Connection Diagram

M28R400CB datasheet

M28R400CB
PDF/DataSheet Download

Datasheet: M28R400CB
File Size: 884638 KB
Manufacturer: STMICROELECTRONICS [STMicroelectronics]
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