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AM42BDS6408HD3I 데이터시트(PDF) 17 Page - SPANSION |
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AM42BDS6408HD3I 데이터시트(HTML) 17 Page - SPANSION |
17 / 90 page October 23, 2003 Am42BDS6408H 15 A D VA NCE I N FO RM ATIO N “bank address” is the address bits required to uniquely select a bank. Similarly, a “sector address” is the address bits required to uniquely select a sector. ICC2 in the “DC Characteristics” section on page 49 represents the active current specification for the write mode. The AC Characteristics section contains timing specification tables and timing diagrams for write oper- ations. Accelerated Program Operation The device offers accelerated program operations through the ACC function. ACC is primarily intended to allow faster manufacturing throughput at the factory. If the system asserts VHH on this input, the device auto- matically enters the aforementioned Unlock Bypass mode and uses the higher voltage on the input to reduce the time required for program operations. The system would use a two-cycle program command sequence as required by the Unlock Bypass mode. Removing VHH from the ACC input returns the device to normal operation. Note that sectors must be unlocked prior to raising ACC to VHH. Note that the ACC pin must not be at VHH for operations other than accelerated programming, or device damage may result. In addition, the ACC pin must not be left floating or unconnected; inconsistent behavior of the device may result. When at VIL, ACC locks all sectors. ACC should be at VIH for all other conditions. |
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