ace93c46 ACE Technology Co., LTD., ace93c46 Datasheet - Page 6

• Manufacturer Part Number: ace93c46
• Description: Three-wire Serial Eeprom
• Manufacturer: ACE Technology Co., LTD.

Notes: The X’s in the address field represent don’t care values and must be clocked.
READ (READ):
address are decoded, data from the selected memory location is available at the serial output pin DO. Output data
changes are synchronized with the rising edges of serial clock SK. It should be noted that a dummy bit (logic “0”)
precedes the 8- or 16-bit data output string.
ERASE/WRITE (EWEN):
applied. An Erase/Write Enable(EWEN) instruction must be executed first before any programming instructions can be
carried out. Please note that once in the EWEN state, programming remains enabled until an EWDS instruction is
executed or VCC power is removed from the part.
ERASE (ERASE):
self-timed erase cycle starts once the ERASE instruction and address are decoded. The DO pin outputs the
Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (TCS). A logic “1” at pin
DO indicates that the selected memory location has been erased, and the part is ready for another instruction.
WRITE (WRITE):
self-timed programming cycle, tWP, starts after the last bit of data is received at serial data input pin DI. The DO pin
outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (TCS). A
logic “0” at DO indicates that programming is still in progress. A logic “1” indicates that the memory location at the
specified address has been written with the data pattern contained in the instruction and the part is ready for further
instructions. A Ready/Busy status cannot be obtained if the CS is brought high after the end of the selftimed
programming cycle, TWP.
ERASE ALL (ERAL):
testing purposes. The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a
minimum of 250 ns (TCS). The ERAL instruction is valid only at VCC = 5.0V ± 10%.
WRITE ALL (WRAL):
The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250ns
(TCS). The WRAL instruction is valid only at VCC = 5.0V ± 10%.
The Read (READ) instruction contains the address code for the memory location to be read. After the instruction and
To assure data integrity, the part automatically goes into the Erase/Write Disable (EWDS) state when power is first
The Erase (ERASE) instruction programs all bits in the specified memory location to the logical “1” state. The
The Write (WRITE) instruction contains the 8 or 16 bits of data to be written into the specified memory location. The
The Erase All (ERAL) instruction programs every bit in the memory array to the logic “1” state and is primarily used for
The Write All (WRAL) instruction programs all memory locations with the data patterns specified in the instruction.
EWDS
1
00
Technology
00XXXXX 00XXXX
Three-wire Serial EEPROM
only at VCC=4.5V to 5.5V
Disables all programming
instructions
ACE93C46
VER 1.2
6