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  • 1 - Table of Contents-
  • 2 - 1. GENERAL DESCRIPTION The N551C161 is an 16-Mbit Mask ROM with interface with Nuvoton PowerSpeech, BandDirector and ViewTalk series products to extend the memory size for long duration applications. 2. FEATURES  Wide range of operation voltage: 2.4 ~ 5.5V @ normal read mode  ROM size: 16-Mbit  SPI ROM interface  Normal read access time: 500 nS  Operating current: 2.5mA (max.)  Available package form:  COB is essential 3. BLOCK DIAGRAM
  • 3 - 4. PIN DESCRIPTION SYMBOL I/O FUNCTION SDI I Command/address input SDO O Data output SCLK I Clock input CSB I Chip select input, low active. When CSB is High, chip is in standby mode and SDO pin is at high impedance VSS I Microcontroller Negative power supply (-). VDD I Microcontroller Positive power supply (+). 5. ABSOLUTE MAXIMUM RATINGS ITEM SYMBOL CONDITIONS RATED VALUE UNIT Power Supply VDD – VSS - -0.3 ~ +7.0 V Input Voltage VIN All Inputs VSS-0.3 ~ VDD+0.3 V Storage Temp. TSTG - -55 ~ +150 C Operating Temp. TOPR - 0 ~ +70 C NOTE: Operating the device under conditions beyond those in dicated above may cause permanent damage or affect device reliability 6. ELECTRICAL CHARACTERISTICS DC Parameters (VDDVSS = 4.5V±10%, TA = 25 C; unless otherwise specified) PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT Operating voltage VDD 2.4 5.5 V Operation current Iop2 SPI interface mode, data output rate 2MHz 2.5 mA Standby current Isb VDD=5.5V 4 A Output high current Ioh Vout=4.0V -5 mA Output low current Iol Vout=0.5V 5 mA Input Low Voltage VIL All input pins -0.3 - 0.8 V Input High Voltage VIH All input pins 2.0 - VDD V
  • 4 - AC Parameters (VDDVSS = 4.5V±10%, TA = 25 C; unless otherwise specified) PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT Serial clock period Tsck Data Read 500 nS Fast Data Read 250 nS Select lead time Tssb 100 nS Data input setup time Tsui 20 nS Data input hold time Thdi 20 nS Data output valid time Tvdo 85 nS SCK CSB SDI Tsui Thdi SDO Tvdo Thdo Tdbo Tsck SPI Mode Interface TsseTssb Tssh (Hi impedance) 7. APPLICATION CIRCUIT
  • 5 - 8. REVISION HISTORY Version Date Substantial Changes Page A1.0 Sep. 2012 Initial Release All A2.0 Jul. 2012 Revise interface of application circuit
  • 6 - Important Notice Nuvoton Products are neither intended nor warranted for usage in systems or equipment, any malfunction or failure of which may cause loss of human life, bodily injury or severe property damage. Such applications are deemed, “Insecure Usage”. Insecure usage includes, but is not limited to: equipment for surgical implementation, atomic energy control instruments, airplane or spaceship instrument s, the control or operation of dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and other applications intended to support or sustain life. All Insecure Usage shall be made at customer’ s risk, and in the event that third parties lay claims to Nuvoton as a result of customer’s Insecure Usage, customer shall indemnify the damages and liabilities thus incurred by Nuvoton.