參數(shù)資料
型號(hào): LH543611
廠商: Sharp Corporation
英文描述: 512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
中文描述: 512 × 36 x一千○二十四分之二× 36 × 2同步雙向先進(jìn)先出
文件頁數(shù): 27/57頁
文件大?。?/td> 475K
代理商: LH543611
TIMING DIAGRAMS (cont’d)
A
CK
A
R/W
EN
MBF
A
2
MAILBOX IN
WRITE TO
MAILBOX #1
READ FROM
MAILBOX #2
EH
t
ES
t
DH
t
DS
t
EH
t
ES
t
A
t
AH
t
AS
t
AH
t
AS
t
AH
t
AS
t
AH
t
AS
t
AH
t
AS
t
AH
t
AS
t
A
2A
A
1A
A
0A
CK
B
MBF
1
OE
A
MBF
t
MAXIMUM OF 2 CK
CYCLES LATENCY
B
t
OH
A
t
t
ZX
MAILBOX OUT
NOTES:
1. Both edges of MBF
2
are synchronized to the Port A clock, CK
A
.
2. Both edges of MBF
1
are synchronized to the Port B clock, CK
B
.
3. There is a maximum of two CK
B
clock cycles of synchronization latency before MBF
1
is asserted to indicate valid new mailbox data.
4. The status of mailbox flags does not prevent mailbox read or write operations.
D
0A
-
D
35A
RWH
t
RWS
t
RWH
t
RWS
t
MBF
t
543611-23
REQ
A
t
RQS
t
RQH
t
RQS
t
RQH
Figure 15. Port A Mailbox Access
512 x 36 x 2/1024 x 36 x 2 BiFIFOs
LH543611/21
27
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