s-93c46b Seiko Instruments Inc., s-93c46b Datasheet - Page 18

• Manufacturer Part Number: s-93c46b
• Description: Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

18
CMOS SERIAL E
S-93C46B/56B/66B
CS
SK
DO
DI
4. 5 Erasing chip (ERAL)
CS
SK
DO
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. If 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 “
Against Write due to Erroneous Instruction Recognition ”.
DI
<1>
1
2
PROM
<1>
0
2
1
3
0
0
2
Figure 17 Chip Erase Timing (S-93C56B, S-93C66B)
1
4
3
0
0
Figure 16 Chip Erase Timing (S-93C46B)
5
1
4
Seiko Instruments Inc.
0
6
5
7
6
6Xs
8
7
4Xs
9
8
10
9
t
CDS
11
t
CDS
t
SV
t
SV
t
PR
B usy
t
PR
Verify
B usy
Function to Protect
Verify
R eady
R eady
Rev.4.3
Standby
Standby
Hi-Z
t
HZ1
Hi-Z
t
_00
HZ1