AK6420AF AKM Semiconductor, Inc., AK6420AF Datasheet

Page 1

ASAHI KASEI † ADVANCED CMOS EEPROM TECHNOLOGY † Wide Vcc (1.8V † AK6420A 2048 bits: 128 AK6440A 4096 bits: 256 AK6480A 8192 bits: 512 † ONE CHIP MICROCOMPUTER INTERFACE - Interface with one chip microcomputer's serial communication port directly † ...

Page 2

... Except when the device is in the status output mode or outputs data, the DO pin is in the high impedance state. „ „ „ „ Type of Products Model Memory size AK6420AF 2Kbits AK6420AM AK6440AF 4Kbits ...

Page 3

ASAHI KASEI „ „ „ „ Pin Function Pin No. Pin name SOP / SSOP RDY/BUSY Vcc ...

Page 4

ASAHI KASEI „ „ „ „ Pin Description CS (Chip Select) When SK is high level and CS is changed from high level to low level, AK6420A/40A/80A can receive the instructions. CS should be kept low level while receiving op-code, ...

Page 5

ASAHI KASEI The AK6420A/40A/80A has 4 instructions such as READ, WRITE, WREN (write enable) and WRDS (write disable). Each instruction is organized by op-code block (8bits), address block (8bits) and data (8bits When input level of SK pin is high ...

Page 6

ASAHI KASEI Write The write instruction is followed by 16 bits of data to be written into the specified address. After the 32nd rising edge read D0 in, the AK6420A/40A/80A will be put into the automatic write ...

Page 7

ASAHI KASEI Read The read instruction is the only instruction which outputs serial data on the DO pin. When the 17th falling edge received , the DO pin will come out of high impedance state and shift ...

Page 8

ASAHI KASEI WREN / WRDS ( Write Enable and Write Disable ) When Vcc is applied to the part, it powers up in the programming disable (WRDS) state. Programming must be preceded by a programming enable (WREN) instruction. Programming remains ...

Page 9

ASAHI KASEI Parameter Power Supply All Input Voltages with Respect to Ground Ambient storage temperature Stress above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of ...

Page 10

ASAHI KASEI (1) D.C. ELECTRICAL CHARACTERISTICS Parameter Symbol Current Dissipation ICC1 ICC2 (WRITE) ICC3 Current Dissipation ICC4 (READ,WREN, ICC5 WRDS) ICC6 Current Dissipation ICC SB (Standby) Input High Voltage1 VIH1 CS, SK, RESET pin Input High Voltage2 VIH2 DI pin ...

Page 11

ASAHI KASEI (2) A.C. ELECTRICAL CHARACTERISTICS Parameter Symbol SK Cycle Time tSKP1 tSKP2 SK Pulse Width tSKW1 tSKW2 SK High Pulse Width tSKH1 tSKH2 *3 tSKH3 CS Setup Time tCSS CS Hold Time tCSH SK Setup Time tSKSH /tSKSL RESET ...

Page 12

ASAHI KASEI (note "A0" for AK6420A, "A1" for AK6440A/80A + = "0" for AK6420A, "A0" for AK6440A/80A DAS01E-00 Synchronous Data Timing Instruction Input Data Output (READ [AK6420A/40A/80A] 1999/05 ...

Page 13

ASAHI KASEI DAS01E- [AK6420A/40A/80A] 1999/05 ...

Page 14

ASAHI KASEI DAS01E- [AK6420A/40A/80A] 1999/05 ...

Page 15

IMPORTANT NOTICE These products and their specifications are subject to change without notice. Before considering any use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized distributor concerning their current status. AKM assumes no liability ...