S-93C46CD0I-J8T1U3 Datasheet, PDF (11/39 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

Rev.1.1_00
3-WIRE SERIAL E²PROM
S-93C46C/56C/66C/76C/86C
 Instruction Sets
1. S-93C46C
Table 11
Instruction
Start Bit
Operation
Code
Address
Data
SK input clock
1
2
3
4
5
6
7
8
9
10 to 25
READ (Data read)
1
1
0
A5 A4 A3 A2 A1 A0 D15 to D0 output^*1
WRITE (Data write)
1
0
1 A5 A4 A3 A2 A1 A0
D15 to D0 input
ERASE (Data erase)
WRAL (Chip write)
1
1
1 A5 A4 A3 A2 A1 A0
−
1
0
0
0
1
x
x
x
x
D15 to D0 input
ERAL (Chip erase)
1
0
0
1
0
x
x
x
x
−
EWEN (Write enable)
1
0
0
1
1
x
x
x
x
−
EWDS (Write disable)
1
0
0
0
0
x
x
x
x
−
*1. When the 16-bit data in the specified address has been output, the data in the next address is output.
Remark x = Don't care.
2. S-93C56C
Table 12
Instruction
Start Bit
Operation
Code
Address
Data
SK input clock
1
2
3 4 5 6 7 8 9 10 11
12 to 27
READ (Data read)
1
1
0
x A6 A5 A4 A3 A2 A1 A0 D15 to D0 output^*1
WRITE (Data write)
1
0
1 x A6 A5 A4 A3 A2 A1 A0 D15 to D0 input
ERASE (Data erase)
1
1
1 x A6 A5 A4 A3 A2 A1 A0
−
WRAL (Chip write)
1
0
0 0 1 x x x x x x D15 to D0 input
ERAL (Chip erase)
1
0
0 10xxxxxx
−
EWEN (Write enable)
1
0
0 11xxxxxx
−
EWDS (Write disable)
1
0
0 00xxxxxx
−
*1. When the 16-bit data in the specified address has been output, the data in the next address is output.
Remark x = Don't care.
3. S-93C66C
Table 13
Instruction
Start Bit
Operation
Code
Address
Data
SK input clock
1
2
3 4 5 6 7 8 9 10 11
12 to 27
READ (Data read)
1
1
0 A7 A6 A5 A4 A3 A2 A1 A0 D15 to D0 output^*1
WRITE (Data write)
1
0
1 A7 A6 A5 A4 A3 A2 A1 A0 D15 to D0 input
ERASE (Data erase)
1
1
1 A7 A6 A5 A4 A3 A2 A1 A0
−
WRAL (Chip write)
1
0
0 0 1 x x x x x x D15 to D0 input
ERAL (Chip erase)
1
0
0 10xxxxxx
−
EWEN (Write enable)
1
0
0 11xxxxxx
−
EWDS (Write disable)
1
0
0 00xxxxxx
−
*1. When the 16-bit data in the specified address has been output, the data in the next address is output.
Remark x = Don't care.
11