m66220sp Mitsumi Electronics, Corp., m66220sp Datasheet - Page 10

• Manufacturer Part Number: m66220sp
• Description: 256 X 8-bit Mail-box
• Manufacturer: Mitsumi Electronics, Corp.

Contention Write Cycle
10
Contention write cycle No.1 (WE control) See Notes 6, 8, 10 and 11.
Contention write cycle No.2 (CS control) See Notes 6, 8, 10 and 12.
(Address B)
(Address A)
(Not Ready A)
(WEA)
(I/O
(I/O
Addresses
A & B
(CSB)
(CSA)
(Not Ready A)
(WEA)
(I/O
(I/O
Address A
Address B
Not Ready B
WEB
I/O
I/O
CSA
CSB
Not Ready B
WEB
I/O
I/O
0
0
0
0
0
0
0
0
B~I/O
A~I/O
B~I/O
A~I/O
B~I/O
A~I/O
B~I/O
A~I/O
(D
(D
(D
OUT
(D
OUT
7
7
7
7
7
7
7
7
IN
IN
B
A)
B
A)
B
A)
B
A)
)
)
)
)
t
APS
t
APS
Address matching
Address A = Address B
Address matching
t
su(A)
t
NAA
t
Address A = Address B
en(CS)
t
NAC
tdis
t
dis(WE)
(WE)
t
su(A-WEH)
t
t
NDA
t
su(CS)
w(WE)
tw
t
NDC
(WE)
Data input determined
t
su(D)
t
NW
Data input determined
t
su(D)
MITSUBISHI DIGITAL ASSP
t
NW
t
h(D)
t
en(WE)
M66220SP/FP
256
t
h(D)
t
en(WE)
8-BIT MAIL-BOX