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參數資料
型號: TPS65950ZXNR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝: 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數: 49/167頁
文件大小: 2566K
代理商: TPS65950ZXNR
32KCLKOUT
CK0
CK1
032-073
12.3.2 HFCLKOUT Output Clock
HFCLKOUT
CHO1
CHO2
032-074
TPS65950
Integrated Power Management/Audio Codec
SWCS032 – OCTOBER 2008
www.ti.com
Table 12-10. 32KCLKOUT Output Clock Switching Characteristics
Name
Parameter
Description
Min(1)
Typ(2)
Max(3)
Unit
CK0
1/tC(32KCLKOUT)
Frequency
32.768
MHz
CK1
tW(32KCLKOUT)
Pulse duration, 32KCLKOUT low or high
0.40*tC(32KCLKOUT)
0.60*tC(32KCLKOUT)
ns
CK2
tR(32KCLKOUT)
Rise time, 32KCLKOUT(4)
16
ns
CK3
tF(32KCLKOUT)
Fall time, 32KCLKOUT(4)
16
ns
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
(4)
The output capacitive load is 30 pF.
Figure 12-12. 32KCLKOUT Output Clock
Table 12-11 lists the electrical characteristics of the HFCLKOUT output clock.
Table 12-11. HFCLKOUT Output Clock Electrical Characteristics
Name
Parameter Description
Min(1)
Typ(2)
Max(3)
Unit
f
Frequency
19.2, 26, or 38.4
MHz
CL
Load capacitance
30
pF
VOUT
Output clock voltage, depending on output reference level IO_1P8 (see Section 2)
1.8(4)
V
VOH
Voltage output high
VOUT – 0.45
VOUT
V
VOL
Voltage output low
0
0.45
V
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
(4)
The output voltage depends on output reference level, which is IO_1P8 (see Section 2).
Table 12-12 lists the timing characteristics of the HFCLKOUT output clock.
Table 12-12. HFCLKOUT Output Clock Switching Characteristics
Name
Parameter
Description
Min(1)
Typ(2)
Max(3)
Unit
CHO1
1/tC(HFCLKOUT)
Frequency
19.2, 26, or 38.4
MHz
CHO2
tW(HFCLKOUT)
Pulse duration, HFCLKOUT low or high
0.40*tC(HFCLKOUT)
0.60*tC(HFCLKOUT)
ns
CHO3
tR(HFCLKOUT)
Rise time, HFCLKOUT(4)
2.6
ns
CHO4
tF(HFCLKOUT)
Fall time, HFCLKOUT(4)
2.6
ns
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
(4)
The output capacitive load is 30 pF.
Figure 12-13 shows the waveform of the HFCLKOUT output clock.
Figure 12-13. HFCLKOUT Output Clock
Clock Specifications
142
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