M93C-46BN6 STMICROELECTRONICS [STMicroelectronics], M93C-46BN6 Datasheet - Page 7

• Manufacturer Part Number: M93C-46BN6
• Description: 16Kbit, 8Kbit, 4Kbit, 2Kbit and 1Kbit (8-bit or 16-bit wide) MICROWIRE Serial Access EEPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

INSTRUCTIONS
The instruction set of the M93Cx6 devices con-
tains seven instructions, as summarized in
5.
lowing parts, as shown in
Table 5. Instruction Set for the M93C46
Note: 1. X = Don't Care bit.
READ
WRITE
EWEN
EWDS
ERASE
ERAL
WRAL
Instruc
to
tion
Each instruction is preceded by a rising edge
on Chip Select Input (S) with Serial Clock (C)
being held Low.
A start bit, which is the first ‘1’ read on Serial
Data Input (D) during the rising edge of Serial
Clock (C).
Two op-code bits, read on Serial Data Input
(D) during the rising edge of Serial Clock (C).
(Some instructions also use the first two bits of
the address to define the op-code).
Table
Read Data from
Memory
Write Data to
Memory
Erase/Write Enable
Erase/Write Disable
Erase Byte or Word
Erase All Memory
Write All Memory
with same Data
7.. Each instruction consists of the fol-
Description
Figure
Start
bit
1
1
1
1
1
1
1
4.:
Code
Op-
10
01
00
00
11
00
00
Address
11X XXXX
00X XXXX
10X XXXX
01X XXXX
Table
A6-A0
A6-A0
A6-A0
x8 Origination (ORG = 0)
M93C86, M93C76, M93C66, M93C56, M93C46
(1)
The M93Cx6 devices are fabricated in CMOS
technology and are therefore able to run as slow
as 0 Hz (static input signals) or as fast as the max-
imum ratings specified in
Q7-Q0
D7-D0
D7-D0
Data
The address bits of the byte or word that is to
be accessed. For the M93C46, the address is
made up of 6 bits for the x16 organization or 7
bits for the x8 organization (see
the M93C56 and M93C66, the address is
made up of 8 bits for the x16 organization or 9
bits for the x8 organization (see
the M93C76 and M93C86, the address is
made up of 10 bits for the x16 organization or
11 bits for the x8 organization (see
Required
Cycles
Clock
18
10
10
10
10
18
Address
11 XXXX
00 XXXX
10 XXXX
01 XXXX
A5-A0
A5-A0
A5-A0
x16 Origination (ORG = 1)
Table 20.
(1)
Q15-Q0
D15-D0
D15-D0
Data
to
Table
Table
Table
Table
Required
Cycles
5.). For
6.). For
Clock
25
25
9
9
9
9
23..
7.).
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