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M29F400BT-70N3 Datasheet(PDF) 3 Page - STMicroelectronics |
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M29F400BT-70N3 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 22 page 3/22 M29F400BT, M29F400BB The blocks in the memory are asymmetrically ar- ranged, see Tables 3 and 4, 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 micro- processor, 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 sig- nals control the bus operation of the memory. They allow simple connection to most micropro- cessors, 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’). Table 2. Absolute Maximum Ratings (1) Note: 1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi- tions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant qual- ity documents. 2. Minimum Voltage may undershoot to –2V during transition and for less than 20ns during transitions. Symbol Parameter Value Unit TA Ambient Operating Temperature (Temperature Range Option 1) 0 to 70 °C Ambient Operating Temperature (Temperature Range Option 6) –40 to 85 °C Ambient Operating Temperature (Temperature Range Option 3) –40 to 125 °C TBIAS Temperature Under Bias –50 to 125 °C TSTG Storage Temperature –65 to 150 °C VIO (2) Input or Output Voltage –0.6 to 6 V VCC Supply Voltage –0.6 to 6 V VID Identification Voltage –0.6 to 13.5 V Table 3. Top Boot Block Addresses, M29F400BT # Size (Kbyte s) Address Range (x8) Address Range (x16) 10 16 7C000h-7FFFFh 3E000h-3FFFFh 9 8 7A000h-7BFFFh 3D000h-3DFFFh 8 8 78000h-79FFFh 3C000h-3CFFFh 7 32 70000h-77FFFh 38000h-3BFFFh 6 64 60000h-6FFFFh 30000h-37FFFh 5 64 50000h-5FFFFh 28000h-2FFFFh 4 64 40000h-4FFFFh 20000h-27FFFh 3 64 30000h-3FFFFh 18000h-1FFFFh 2 64 20000h-2FFFFh 10000h-17FFFh 1 64 10000h-1FFFFh 08000h-0FFFFh 0 64 00000h-0FFFFh 00000h-07FFFh Table 4. Bottom Boot Block addresses, M29F400BB # Size (Kbyte s) Address Range (x8) Address Range (x16) 10 64 70000h-7FFFFh 38000h-3FFFFh 9 64 60000h-6FFFFh 30000h-37FFFh 8 64 50000h-5FFFFh 28000h-2FFFFh 7 64 40000h-4FFFFh 20000h-27FFFh 6 64 30000h-3FFFFh 18000h-1FFFFh 5 64 20000h-2FFFFh 10000h-17FFFh 4 64 10000h-1FFFFh 08000h-0FFFFh 3 32 08000h-0FFFFh 04000h-07FFFh 2 8 06000h-07FFFh 03000h-03FFFh 1 8 04000h-05FFFh 02000h-02FFFh 0 16 00000h-03FFFh 00000h-01FFFh |
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