S-93C46B_1 Datasheet, PDF (12/50 Pages) Seiko Instruments Inc – 3-WIRE SERIAL E2PROM

3-WIRE SERIAL E²PROM
S-93C46B/56B/66B
Rev.7.0_00
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 yyy
A₁ A₀ = 1 yyy 1 1) rolls over to the top address (A_n yyy A₁ A₀ = 0 yyy 0 0).
CS
SK
1 2 3 4 5 6 7 8 9 10 11 12
23 24 25 26 27 28
39 40 41 42 43 44
DI
①1
0
A5 A4 A3 A2 A1 A0
DO
High-Z
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
High-Z
ADRINC
Figure 9 Read Timing (S-93C46B)
ADRINC
CS
SK
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
DI
DO
①1 0
A6 A₅ A₄ A₃ A₂ A₁ A₀
High-Z
x : S-93C56B
A7: S-93C66B
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
ADRINC
ADRINC
High-Z
Figure 10 Read Timing (S-93C56B, S-93C66B)
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Seiko Instruments Inc.