S-93C86B Datasheet, PDF (12/34 Pages) Seiko Instruments Inc – CMOS SERIAL E2PROM

CMOS SERIAL E²PROM
S-93C86B
Rev.2.2_00
4.2 Writing data (WRITE)
To write 16-bit data to a specified address, change CS to high and then input the WRITE
instruction, address, and 16-bit data following the start bit. The write operation starts when CS
goes low. There is no need to set the data to 1 before writing. When the clocks more than the
specified number have been input, the clock pulse monitoring circuit cancels the WRITE instruction.
For details of the clock pulse monitoring circuit, refer to “„ Function to Protect Against Write due
to Erroneous Instruction Recognition”.
tCDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12 13 14
29
DI
DO
<1> 0 ₁ A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D15
Hi-Z
D0
tSV
tHZ1
busy
ready
tPR
Hi-Z
Figure 6 Data Write Timing
4.3 Erasing data (ERASE)
To erase 16-bit data at a specified address, set all 16 bits of the data to 1, change CS to high, and
then input the ERASE instruction and address following the start bit. There is no need to input data.
The data erase operation starts when CS goes low. When the clocks more than the specified
number have been input, the clock pulse monitoring circuit cancels the ERASE instruction. For
details of the clock pulse monitoring circuit, refer to “„ Function to Protect Against Write due to
Erroneous Instruction Recognition”.
tCDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12 13
DI
DO
<1> 1 1 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
Hi-Z
tSV
tPR
busy
ready
tHZ1
Hi-Z
Figure 7 Data Erase Timing
12
Seiko Instruments Inc.