ACE93C46.56.66
Three-wire Serial EEPROM
Symbol
Parameter
Test Condition
Min Typ Max
Units
4.5≦Vcc≦5.5v
250
250
1000
250
250
1000
250
250
1000
100
100
400
2.7≦Vcc≦5.5V
1.8V≦Vcc≦5.5V
4.5≦Vcc≦5.5v
2.7≦Vcc≦5.5V
1.8V≦Vcc≦5.5V
4.5≦Vcc≦5.5v
2.7≦Vcc≦5.5V
1.8V≦Vcc≦5.5V
4.5≦Vcc≦5.5v
2.7≦Vcc≦5.5V
1.8V≦Vcc≦5.5V
tpd1
Output Delay to “1”
AC Test
AC Test
AC Test
ns
tpd0
tsv
Output Delay to “0”
ns
ns
ns
CS to Status Valid
CS to DO in High
Impedance
AC Test
CS=VIL
tdf
twp
Write Cycle Time
1.5
5
ms
Write
Cycle
Endurance(1)
1M
5.0V, 25℃
Note: 1. This parameter is characterized and is not 100% tested.
Functional Description
The ACE93C46/56/66 is accessed via a simple and versatile three-wire serial communication interface. Device
operation is controlled by seven instructions issued by the host processor. Avalid instruction starts with a rising edge of
CS and consists of a start bit (logic“1”) followed bythe appropriateop code andthedesired memoryaddresslocation.
Instruction Set for the ACE93C46
Address
*8
Data
*8 *16
OP
Code
Instruction SB
Comments
*16
Read data stored in memory, at
specified address
READ
EWEN
1
1
10
00
A6-A0
A5-A0
Write enable must precede all
programming modes
11XXXXX 11XXXX
REASE
WRITE
1
1
11
01
A6-A0
A6-A0
A5-A0
A5-A0
Erase memory location An-A0
D7-D0 D15-D0
Writes memory location An-A0
Erases all memory locations. Valid
only at VCC=4.5V to 5.5V
Writes all memory locations. Valid
only at VCC=4.5V to 5.5V
Disables all programming
instructions
ERAL
WRAL
EWDS
1
1
1
00
00
00
10XXXXX 10XXXX
01XXXXX 01XXXX D7-D0 D15-D0
00XXXXX 00XXXX
Notes: The X’s in the address field represent don’t care values and must be clocked.
VER 1.5
6
ACE [ ACE TECHNOLOGY CO., LTD. ]
