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M28W800BT70ZB6T Datasheet(PDF) 5 Page - STMicroelectronics |
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M28W800BT70ZB6T Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 42 page  5/42 M28W800BT, M28W800BB SUMMARY DESCRIPTION The M28W800B is a 8 Mbit (512Kbit x 16) non-vol- atileFlash memory that canbeerasedelectrically at the block level and programmed in-system on a Word-by-Word basis. These operations can be performed using a single low voltage (2.7 to 3.6V) supply. VDDQ allows to drive the I/O pin down to 1.65V. An optional 12V VPP power supply is pro- vided to speed up customer programming. The device features an asymmetrical blocked ar- chitecture. The M28W800B has an array of 23 blocks: 8 Parameter Blocks of 4 KWord and 15 Main Blocks of 32 KWord. M28W800BT has the Parameter Blocks at the top of the memory ad- dress space while the M28W800BB locates the Parameter Blocks starting from the bottom. The memory maps are shown in Figure 5, Block Ad- dresses. Parameter blocks 0 and 1 can be protected from accidental programming or erasure. Each block can be erased separately. Erase can be suspend- ed 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. Program and Erase commands are written to the Command Interface of the memory. An on-chip Program/Erase Controller takes care of the tim- ings 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 TSOP48 (10 X 20mm), and TFBGA46 (6.39 x 6.37mm, 0.75mm pitch) packages and is supplied with all the bits erased (set to ’1’). Figure 2. Logic Diagram Table 1. Signal Names A0-A18 Address Inputs DQ0-DQ15 Data Input/Output E Chip Enable G Output Enable W Write Enable RP Reset WP Write Protect VDD Core Power Supply VDDQ Power Supply for Input/Output VPP Optional Supply Voltage for Fast Program & Erase VSS Ground NC Not Connected Internally AI03581 19 A0-A18 W DQ0-DQ15 VDD M28W800BT M28W800BB E VSS 16 G RP WP VDDQ VPP |
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