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| 型號： | DSP1628 |
| 英文描述： | TVS 400W 60V BIDIRECT SMA |
| 中文描述： | 澄清，串行I /設(shè)備的DSP1620/27/28/29 O控制注冊說明 |
| 文件頁數(shù)： | 99/114頁 |
| 文件大小： | 804K |
| 代理商： | DSP1628 |
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Preliminary Data Sheet
February 1997
DSP1628 Digital Signal Processor
97
Lucent Technologies Inc.
10 Timing Characteristics for 2.7 V Operation
(continued)
10.8 PHIF Specifications
For the PHIF, read means read by the external user (output by the DSP); write is similarly defined. The 8-bit reads/
writes are identical to one-half of a 16-bit access.
Figure 22. PHIF IntelMode Signaling (Read and Write) Timing Diagram
* This timing diagram for the PHIF port shows accesses using the PCSN signal to initiate and complete a transaction. The transactions can also
be initiated and completed with the PIDS and PODS signals. An output transaction (read) is initiated by PCSN or PODS going low, whichever
comes last. For example, the timing requirements referenced to PCSN going low, t45 and t49, should be referenced to PODS going low, if
PODS goes low after PCSN. An output transaction is completed by PCSN or PODS going high, whichever comes first. An input transaction is
initiated by PCSN or PIDS going low, whichever comes last. An input transaction is completed by PCSN or PIDS going high, whichever comes
first. All requirements referenced to PCSN apply to PIDS or PODS, if PIDS or PODS is the controlling signal.
Table 84. Timing Requirements for PHIF IntelMode Signaling
Abbreviated Reference
t41
PODS to PCSN Setup (low to low)
t42
PCSN to PODS Hold (high to high)
t43
PIDS to PCSN Setup (low to low)
t44
PCSN to PIDS Hold (high to high)
t45*
PSTAT to PCSN Setup (valid to low)
t46*
PCSN to PSTAT Hold (high to invalid)
t47*
PBSEL to PCSN Setup (valid to low)
t48*
PCSN to PBSEL Hold (high to invalid)
t51*
PB Write to PCSN Setup (valid to high)
t52*
PCSN to PB Write Hold (high to invalid)
Parameter
Min
0
0
0
0
4
0
6
0
10
4
Max
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Table 85. Timing Characteristics for PHIF IntelMode Signaling
Abbreviated Reference
t49*
PCSN to PB Read (low to valid)
t50*
PCSN to PB Read Hold (high to invalid)
t154
PCSN to PB Read 3-state (high to 3-state)
Parameter
Min
—
0
—
Max
12
—
8
Unit
ns
ns
ns
PCSN
V
IH
V
IL
t41
t42
t43
t45
t46
t49
t50
t154
16-bit READ
16-bit WRITE
PODS
PIDS
PBSEL
PSTAT
PB[7:0]
t47
t51
t52
t48
t44
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
5-4036 (C)
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