S93C86B-H Datasheet, PDF (14/28 Pages) Seiko Instruments Inc – FOR AUTOMOTIVE OPERATION 3-WIRE SERIAL E2PROM

FOR AUTOMOTIVE 105°C OPERATION 3-WIRE SERIAL E²PROM
S-93C86B H Series
Rev.2.1_02
4.4 Writing to chip (WRAL)
To write the same 16-bit data to the entire memory address space, change CS to high, and then input the WRAL
instruction, an address, and 16-bit data following the start bit. Any address can be input. 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 been input, the clock pulse monitoring circuit cancels the WRAL instruction. For details of the
clock pulse monitoring circuit, refer to “ Function to Protect Against Write due to Erroneous Instruction
Recognition”.
t_CDS
CS
Verify
Standby
SK
1 2 3 4 5 6 7 8 9 10 11 12 13 14
29
DI
<1> 0 0 0
1
DO
High-Z
8Xs
D15
D0
tSV
t_PR
tHZ1
busy
ready
High-Z
Figure 8 Chip Write Timing
4.5 Erasing chip (ERAL)
To erase the data of the entire memory address space, set all the data to 1, change CS to high, and then input
the ERAL instruction and an address following the start bit. Any address can be input. There is no need to
input data. The chips 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 ERAL instruction. For details of the
clock pulse monitoring circuit, refer to “ Function to Protect Against Write due to Erroneous Instruction
Recognition”.
CS
tCDS
SK
1
2
3
4
5
6
7
8
9 10 11 12 13
Verify
Standby
DI
<1> 0
010
8Xs
DO
High-Z
t_SV
tHZ1
busy _ready
High-Z
t_PR
Figure 9 Chip Erase Timing
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