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M93C46-DW7TP View Datasheet(PDF) - STMicroelectronics

Part NameM93C46-DW7TP ST-Microelectronics
STMicroelectronics ST-Microelectronics
Description16Kbit, 8Kbit, 4Kbit, 2Kbit and 1Kbit (8-bit or 16-bit wide) MICROWIRE® Serial Access EEPROM
M93C46-DW7TP Datasheet PDF : 31 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
M93C86, M93C76, M93C66, M93C56, M93C46
INSTRUCTIONS
The instruction set of the M93Cx6 devices con-
tains seven instructions, as summarized in Table
5. to Table 7.. Each instruction consists of the fol-
lowing parts, as shown in Figure 4.:
s Each instruction is preceded by a rising edge
on Chip Select Input (S) with Serial Clock (C)
being held Low.
s A start bit, which is the first 1read on Serial
Data Input (D) during the rising edge of Serial
Clock (C).
s 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).
s 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 Table 5.). For
the M93C56 and M93C66, the address is
made up of 8 bits for the x16 organization or 9
bits for the x8 organization (see Table 6.). For
the M93C76 and M93C86, the address is
made up of 10 bits for the x16 organization or
11 bits for the x8 organization (see Table 7.).
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 Table 20. to Table 23..
Table 5. Instruction Set for the M93C46
Instruc
tion
Description
Start Op-
bit Code
x8 Origination (ORG = 0)
Address1
Data
Required
Clock
Cycles
x16 Origination (ORG = 1)
Address1
Data
Required
Clock
Cycles
READ
Read Data from
Memory
1
10
A6-A0 Q7-Q0
A5-A0 Q15-Q0
WRITE
Write Data to
Memory
1
01
A6-A0 D7-D0
18
A5-A0 D15-D0
25
EWEN Erase/Write Enable 1
00 11X XXXX
10
11 XXXX
9
EWDS Erase/Write Disable 1
00 00X XXXX
10
00 XXXX
9
ERASE Erase Byte or Word 1
11
A6-A0
10
A5-A0
9
ERAL Erase All Memory
1
00 10X XXXX
10
10 XXXX
9
WRAL
Write All Memory
with same Data
1
00 01X XXXX D7-D0
18
01 XXXX D15-D0
25
Note: 1. X = Dont Care bit.
6/31
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