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M36P0R9060E0ZACE Datasheet(PDF) 10 Page - STMicroelectronics |
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M36P0R9060E0ZACE Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 23 page 2 Signal descriptions M36P0R9060E0 10/23 2.5 Wait (WAIT) WAIT is an output pin common to the Flash memory and PSRAM components. However the WAIT signal does not behave in the same way for the PSRAM and the Flash memory. For details of how it behaves, please refer to the M69KB096AM datasheet for the PSRAM and to the M58PRxxxJ datasheet for the Flash memory. 2.6 Flash Chip Enable input (EF) The Chip Enable input activates the control logic, input buffers, decoders and sense amplifiers of the Flash memory. When Chip Enable is Low, VIL, and Reset is High, VIH, the device is in active mode. When Chip Enable is at VIH the Flash memory are deselected, the outputs are high impedance and the power consumption is reduced to the standby level. It is not allowed to have EF at VIL and EP at VIL at the same time. Only one memory component can be enabled at a time. 2.7 Flash Output Enable inputs (GF) The Output Enable input controls the data outputs during Flash memory Bus Read operations. 2.8 Flash Write Enable (WF) The Write Enable input controls the Bus Write operation of the Flash memory Command Interface. The data and address inputs are latched on the rising edge of Chip Enable or Write Enable whichever occurs first. 2.9 Flash Write Protect (WPF) Write Protect is an input that gives an additional hardware protection for each block. When Write Protect is Low, VIL, Lock-Down is enabled and the protection status of the Locked- Down blocks cannot be changed. When Write Protect is at High, VIH, Lock-Down is disabled and the Locked-Down blocks can be locked or unlocked. (See the Lock Status Table in the M58PRxxxJ datasheet). 2.10 Flash Reset (RPF) The Reset input provides a hardware reset of the Flash memories. When Reset is at VIL, the memory is in Reset mode: the outputs are high impedance and the current consumption is reduced to the Reset Supply Current IDD2. Refer to the M58PRxxxJ datasheet, for the value of IDD2. After Reset all blocks are in the Locked state and the Configuration Register is reset. When Reset is at VIH, the device is in normal operation. Exiting Reset mode the device enters Asynchronous Read mode, but a negative transition of Chip Enable or Latch Enable is required to ensure valid data outputs. The Reset pin can be interfaced with 3V logic without any additional circuitry. It can be tied to VRPH (refer to the M58PRxxxJ datasheet). |
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