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IS49FL004T Datasheet(PDF) 5 Page - Integrated Silicon Solution, Inc |
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IS49FL004T Datasheet(HTML) 5 Page - Integrated Silicon Solution, Inc |
5 / 45 page IS49FL004T Integrated Silicon Solution, Inc.- www.issi.com 5 Rev. A1 9/19/2013 Description Address Data Manufacturer ID 00000h 00002h 9Dh 7Fh Device ID IS49FL004 4Mb 00001h 6Eh BLOCK DIAGRAM T BL# WP # INIT# FWH[3:0] or LAD[3:0] FWH 4 o r LF R AME# CL K GPI[4:0] F W H / L P C M O D E I N T E R F A C E E R A S E / P R O G R A M V O L T A G E G E N E R A T O R HI G H V O L T A G E S W I T C H I/ O B U F F E R S A[10:0] I/O[7:0] WE # OE # R/C# IC R S T # P P M O D E I N T E R F A C E C O N T R O L L O G I C D A T A L A T C H S E N S E AM P Y - D E C O D E R X - D E C O D E R Y - G A T I N G M E M O R Y A R R A Y DEVICE OPERATION MODE SELECTION The IS49FL004 can operate in two configurable interfaces: The In-System Hardware interface and Ad- dress/Address Multiplexed (A/A Mux) interface con- trolled by IC pin. If the IC pin is set to logic high (VIH), the devices enter into A/A Mux interface mode. If the IC pin is set logic low (VIL), the devices will be in in-system hardware interface mode. During the in-system hard- ware interface mode, the devices can automatically de- tect the Firmware Hub (FWH) or Low Pin Count (LPC) memory cycle sent from host system and response to the command accordingly. The IC pin must be setup during power-up or system reset, and stays no change during device operation. When working in-system, typically on a PC or Notebook, the IS49FL004 are connected to the host system through a 5-pin communication interface operated based on a 33-MHz synchronous clock. The 5-pin interface is defined as FWH[3:0] and FWH4 pins under FWH mode or as LAD[3:0] and LFRAME# pins under LPC mode for easy understanding as to those existing compatible prod- ucts. When working off-system, typically on a EPROM Programmer, the devices are operated through 11-pin multiplexed address - A[10:0] and 8-pin data I/O - I/O[7: 0] interfaces. The memory addresses of devices are in- put through two bus cycles as row and column addresses controlled by a R/C# pin. PRODUCT IDENTIFICATION The product identification mode can be used to read the Manufacturer ID and the Device ID by a software Prod- uct ID Entry command in both in-system hardware in- terface and A/A Mux interface modes. The product indentification mode is activated by three-bus-cycle com- mand. Refer to Table 1 for the Manufacturer ID and De- vice ID of IS49FL00x and Table 14 for the SDP Com- mand Definition. In FWH mode, the product identification can also be read directly at FFBC0000h for Manufacturer ID - “9Dh” and FFBC0001h for Device ID in the 4 GByte system memory map. Table 1: Product Identification |
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