參數資料
型號: XRT86VL3x
廠商: Exar Corporation
元件分類: 通信及網絡
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數: 148/153頁
文件大?。?/td> 1316K
代理商: XRT86VL3X
XRT86VL3X
141
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.2
P
OWER
PC 403 S
YCHRONOUS
I
NTERFACE
T
IMING
The signals used in the Power PC 403 Synchronus microprocessor interface mode are: Address Strobe (AS),
Microprocessor Clock (uPCLK), Data Strobe (DS), Read/Write Enable (R/W), Chip Select (CS), Address and
Data bits. The interface timing is shown in
Figure 123
. The I/O specifications are shown in
Table 28
.
F
IGURE
123. P
OWER
PC 403 I
NTERFACE
S
IGNALS
D
URING
P
ROGRAMMED
I/O R
EAD
AND
W
RITE
O
PERATIONS
T
ABLE
28: P
OWER
PC 403 M
ICROPROCESSOR
I
NTERFACE
T
IMING
S
PECIFICATIONS
S
YMBOL
P
ARAMETER
M
IN
M
AX
U
NITS
t
0
Valid Address to CS Falling Edge
0
-
ns
t
1
CS Falling Edge to WE Assert
0
-
ns
t
2
WE Assert to TA Assert
-
320
ns
NA
WE Pulse Width (t
2
)
320
-
ns
t
3
CS Falling Edge to TS Falling Edge
0
-
t
dc
μ
PCLK Duty Cycle
40
60
%
t
cp
μ
PCLK Clock Period
20
-
ns
Valid Data Readback
Data Available to Write into LIU
Valid Address
Valid Address
t
2
t
1
t
3
t
0
t
0
t
1
t
3
t
2
READ OPERATION
WRITE OPERATION
TS/ALE
μ
PCLK
ADDR[14:0]
CS
DATA[7:0]
WE
R/W
TA/RDY
t
CP
t
DC
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