S-93C46B Datasheet, PDF (13/45 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

Rev.4.3_00
CMOS SERIAL E²PROM
S-93C46B/56B/66B
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 (Hi-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
<1> 1
0
A5 A4 A3 A2 A1 A0
DO
Hi-Z
0
D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
Hi-Z
ADRINC
ADRINC
Figure 8 Read Timing (S-93C46B)
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
<1> 1 0
A6 A5 A4 A3 A2 A1 A0
X: S-93C56B
Hi-Z A₇: S-93C66B
0 D15 D14 D13
D2 D1 D0 D15 D14 D13
D2 D1 D0 D15 D14 D13
Hi-Z
ADRINC
Figure 9 Read Timing (S-93C56B, S-93C66B)
ADRINC
Seiko Instruments Inc.
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