M93C86, M93C76, M93C66, M93C56, M93C46
Instructions
Table 6. Instruction set for the M93C56 and M93C66
Instruction
Description
Start Op-
bit code
x8 origination (ORG = 0)
x16 origination (ORG = 1)
Address
(1) (2)
Data
Required Address
clock cycles (1) (3)
Data
Required
clock cycles
READ
Read Data from
Memory
1
10
A8-A0 Q7-Q0
WRITE
Write Data to
Memory
1 01 A8-A0 D7-D0
20
WEN
Write Enable
1
00
1 1XXX
XXXX
12
WDS
Write Disable
1
00
0 0XXX
XXXX
12
ERASE
Erase Byte or
Word
1 11 A8-A0
12
ERAL
Erase All
Memory
1
00
1 0XXX
XXXX
12
WRAL
Write All Memory
with same Data
1
00
0 1XXX
XXXX
D7-D0
20
1. X = Don't Care bit.
2. Address bit A8 is not decoded by the M93C56.
3. Address bit A7 is not decoded by the M93C56.
A7-A0 Q15-Q0
A7-A0 D15-D0
27
11XX
XXXX
11
00XX
XXXX
11
A7-A0
11
10XX
XXXX
11
01XX
XXXX
D15-D0
27
Table 7. Instruction set for the M93C76 and M93C86
Instruction
Description
x8 Origination (ORG = 0)
x16 Origination (ORG = 1)
Start Op-
bit code Address(1),
(2)
Data
Required
clock
Address
(1) (3)
cycles
Data
Required
clock
cycles
READ
WRITE
WEN
Read Data from
Memory
Write Data to
Memory
Write Enable
1 10 A10-A0 Q7-Q0
A9-A0 Q15-Q0
1 01 A10-A0 D7-D0 22
A9-A0 D15-D0 29
1
00
11X XXXX
XXXX
14
11 XXXX
XXXX
13
WDS
Write Disable
1
00
00X XXXX
XXXX
14
00 XXXX
XXXX
13
ERASE Erase Byte or Word 1 11 A10-A0
14
A9-A0
13
ERAL
WRAL
Erase All Memory
1
00
10X XXXX
XXXX
14
10 XXXX
XXXX
13
Write All Memory
with same Data
1
00
01X XXXX
XXXX
D7-D0
22
01 XXXX
XXXX
D15-D0
29
1. X = Don't Care bit.
2. Address bit A10 is not decoded by the M93C76.
3. Address bit A9 is not decoded by the M93C76.
Doc ID 4997 Rev 10
13/37