參數(shù)資料
型號: B900J24PXX12I
元件分類: 數(shù)字信號處理
英文描述: 0-BIT, 80 MHz, OTHER DSP, PQFP44
文件頁數(shù): 82/100頁
文件大?。?/td> 1547K
代理商: B900J24PXX12I
82
Lucent Technologies Inc.
B900
Advance Data Sheet
Baseband Signal Processor
July 1999
8 Timing Requirements and Characteristics (continued)
8.6
Input/Output Ports (IOP)
5-4019.a
Figure 16. Write Outputs Followed by Read Inputs (cbit = Immediate; a1 = sbit)
Table 105. Timing Requirements for IOP Input Read
Ref
Parameter
B900
Unit
VDD = 4.5 V to 5.5 V
VDD = 3.0 V to 3.6 V
TMIN = 12.5 ns
TMIN = 16.7 ns
Min
Max
Min
Max
t21
IOP Input Setup Time (valid to high)
20
20
ns
t22
IOP Input Hold Time (high to invalid)
0
0
ns
Table 106. Timing Characteristics for IOP Output
Ref
Parameter
B900
Unit
VDD = 4.5 V to 5.5 V
VDD = 3.0 V to 3.6 V
TMIN = 12.5 ns
TMIN = 16.7 ns
Min
Max
Min
Max
t23
IOP Output Valid Time (low to valid)
4
4
ns
t24
IOP Output Hold Time (low to invalid)
–4
–4
ns
CLKFREE
IOP
(INPUT)
t22
VALID OUTPUT
VOH–
VOL–
DATA INPUT
t23
t24
IOP
(OUTPUT)
VOH–
VOL–
VIH–
VIL–
t21
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