AK6416C Datasheet, PDF (4/14 Pages) Asahi Kasei Microsystems – 16Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6416C]
Pin Description
CS (Chip Select)
When SK is high level and CS is changed from high level to low level, AK6416C can receive
the instructions. CS should be kept low level while receiving op-code, address and data and
while outputting data. If CS is changed to high level during the above period, AK6416C stops
the instruction execution. When SK is low and CS is changed from high level to low level,
AK6416C will be in status output mode. The CS need not be low level during the automatic
write time-out period ( Busy status).
SK (Serial Clock)
The SK clock pin is the synchronous clock input for input/output data. At write operation,
AK6416C takes in the write data from data input pin (DI) synchronously with rising edge of input
pulse of serial clock pin ( SK ). And at read operation, AK6416C takes out the read data to data
output pin (DO) synchronously with falling edge of SK . The SK clock is not needed during
the automatic write time-out period ( Busy status), the status output period and when the device
isn't selected ( CS = high level).
DI (Data Input)
The op-code, address and write data is input to the DI pin.
DO (Data Output)
The DO pin outputs the read data and status signal and will be high impedance except for this
timing.
RDY/ BUSY (Ready/ Busy status)
This pin outputs the internal programming status. When the AK6416C is in the automatic write
time-out period, this pin outputs the low level ( Busy status), and outputs the high level except for
this timing.
RESET (Reset)
The AK6416C stops executing the write instruction when the RESET pin is high level. The
RESET pin should be low level while the write instruction input period and the page write
instruction input period and the automatic write time-out period. If the RESET pin is high level
while the automatic write time-out period, the AK6416C stops execution of internal programming
and the device returns to ready status. In this case the word data of the specified address will be
incomplete. When inputting the new instruction after RESET, the CS pin should be set to high
level. The read, write enable and write disable instructions are not affected by RESET pin status.
VCC (Power Supply)
GND (Ground)
DAS05E-00
-4-
2005/03