S93S46A Datasheet, PDF (10/25 Pages) Seiko Instruments Inc – 3-WIRE SERIAL E2PROM FOR AUTOMOTIVE

150°C OPERATION 3-WIRE SERIAL E²PROM FOR AUTOMOTIVE
S-93S46A/56A/66A
Rev.2.1_00
3. Reading (READ)
The READ instruction reads data from a specified address.
After the CS pin goes to "H", input an instruction in the order of the start bit, read instruction, and address. Since the
last input address (A₀) has been latched, the output status of the DO pin changes from "High-Z" to "L", which is held
until the next rising of the SK. 16-bit data starts to be output in synchronization with the next rising of the SK.
3. 1 Sequential read
After the 16-bit data at the specified address has been output, inputting the SK while the CS pin is "H"
automatically increments the address, and causes the 16-bit data at the next address to be output sequentially.
The above method makes it possible to read the data in the whole memory space. The last address (A_n  A₁
A₀ = 1  1 1) rolls over to the top address (A_n  A₁ A₀ = 0  0 0).
CS
SK
DI
DO
1 2 3 4 5 6 7 8 9 10 11 12
22 23 24 25 26 27
38 39 40 41 42 43
<1> 1 0 _{A5 A4 A3 A2 A1 A0}
High-Z
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
ADRINC
ADRINC
High-Z
CS
SK
DI
DO
Figure 2 Read Timing (S-93S46A)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
24 25 26 27 28 29
40 41 42 43 44 45
<1> 1 0
A6 A₅ A₄ A₃ A₂ A₁ A₀
High-Z
x:S-93S56A
A₇:S-93S66A
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
ADRINC
Figure 3 Read Timing (S-93S56A/66A)
ADRINC
High-Z
10
Seiko Instruments Inc.