S93A46A Datasheet, PDF (11/41 Pages) Seiko Instruments Inc – 125C OPERATION 3-WIRE SERIAL

Rev.6.1_00
125°C OPERATION 3-WIRE SERIAL E²PROM FOR AUTOMOTIVE
S-93A46A/56A/66A
3. Reading (READ)
The READ instruction reads data from a specified address.
After CS has gone high, 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 impedance (High-Z) to low,
which is held until the next rise of SK. 16-bit data starts to be output in synchronization with the next rise of SK.
3. 1 Sequential read
After the 16-bit data at the specified address has been output, inputting SK while CS is high 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
1 2 3 4 5 6 7 8 9 10 11 12
22 23 24 25 26 27
38 39 40 41 42 43
DI
DO
<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
High-Z
ADRINC
Figure 6 Read Timing (S-93A46A)
ADRINC
CS
SK
DI
DO
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-93A56A
A7:S-93A66A
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
ADRINC
Figure 7 Read Timing (S-93A56A, S-93A66A)
ADRINC
High-Z
Seiko Instruments Inc.
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