MB85AS8MT ■ PIN FUNCTIONAL DESCRIPTIONSPin No. Pin NameFunctional description Chip Select pin This is an input pin to make chips select. When CS is “H” level, device is in deselect 1 CS (standby) status and SO becomes High-Z. Inputs from other pins are ignored for this time. When CS is “L” level, device is in select (active) status. CS has to be “L” level before inputting op-code. Write Protect pin (available only for SOP package) This is a pin to control writing to a status register. The writing of status register (see “■ 3 WP STATUS REGISTER”) is protected in related with WP and WPEN. See “■ WRITING PROTECT” for detail. Hold pin (available only for SOP package) This pin is used to interrupt serial input/output without making chips deselect. When 7 HOLD HOLD is “L” level, hold operation is activated, SO becomes High-Z, SCK and SI become do not care. While the hold operation, CS has to be retained “L” level. Serial Clock pin 6 SCK This is a clock input pin to input/output serial data. SI is loaded synchronously to a rising edge, SO is output synchronously to a falling edge. Serial Data Input pin 5 SI This is an input pin of serial data. This inputs op-code, address, and writing data. Serial Data Output pin 2 SO This is an output pin of serial data. Reading data of ReRAM memory cell array and status register data are output. This is High-Z during standby. 8 VDD Supply Voltage pin 4 VSS Ground pin *: Pin No. is for SOP package. DS501-00060-1v0-E 3 Document Outline DESCRIPTION FEATURES PIN ASSIGNMENT PIN FUNCTIONAL DESCRIPTIONS BLOCK DIAGRAM SPI MODE SERIAL PERIPHERAL INTERFACE (SPI) STATUS REGISTER OP-CODE COMMAND WRITING OPERATION OF NONVOLATILE MEMORY 1. Address counter control 2. WIP polling BLOCK PROTECT WRITING PROTECT HOLD OPERATION (available only for SOP package) ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS 1. DC Characteristics 2. AC Characteristics 3. Pin Capacitance TIMING DIAGRAM POWER ON/OFF SEQUENCE ReRAM CHARACTERISTICS ESD AND LATCH-UP MB85AS8MTPF (8-pin plastic SOP) REFLOW CONDITIONS AND FLOOR LIFE CURRENT STATUS ON CONTAINED RESTRICTED SUBSTANCES ORDERING INFORMATION PACKAGE DIMENSION MARKING (11-pin WLP) MARKING (8-pin SOP) PACKING FIGURE 1. Emboss carrier tape and package direction of storage 2. Reel EMBOSS CARRIER TAPE DRAWING
