Collection of Product FAQs
Author: Kano Tomoo
<Information Level>
A:
Index:
<Product>
Division name: 01 IC
Category 1:
Category 2:
Cal No.:
Related documents:
12 Memory
2. Serial EEPROM
S-93C46A/56A/66A
Public (Printing O.K.)
D: Technical terms
Date: 98/11/12 (Thursday) 10:17 (modified: 99/01/22 (Friday))
Question:
What about the basic term (start bit)?
Answer:
Start bit
→serial
3-wire bus EEPROM (a 2-wire bus type is used for the start condition)
When a command is issued the 3-wire bus EEPROM must obtain “1” from a DI input in order to
recognize this command (this is a rule).
Operation
Address
Data
S-29L130A
S-29L220A
S-29L330A
Command
READ(Data read)
WRITE(Data write)
ERASE(Data erase)
EWEN(Program enable)
EWDS(Program disable)
<Remarks>
FAQ No.: 12015
Start bit
code
1
1
1
1
1
10
01
11
00
00
A
5
-A
0
A
5
-A
0
A
5
-A
0
11xxxx
00xxxx
XA
6
-A
0
XA
6
-A
0
XA
6
-A
0
A
7
-A
0
A
7
-A
0
A
7
-A
0
D
15
-D
0
Output*
D
15
-D
0
Input
-
-
-
11xxxxxx 11xxxxxx
00xxxxxx 00xxxxxx
24
SII [ SEIKO INSTRUMENTS INC ]
