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參數資料
型號： TPS65950ZXNT
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： 56/167頁
文件大小： 2566K
代理商： TPS65950ZXNT
13.5 Voice/Bluetooth PCM Interfaces
PCM.VFS
PCM.VCK
PCM.VDR
PCM.VDX
15
14
1
0
49dummybits
15
14
15
14
1
0
49dummybits
15
14
P3
P4
P1
P0
P2
P5
032-081
TPS65950
Integrated Power Management/Audio Codec
www.ti.com
SWCS032 – OCTOBER 2008
Table 13-7. TDM Interface Master Mode Timing Requirements
Notation
Parameter
Min(1)
Max(2)
Unit
T3
tsu(DIN-CLKH)
Setup time, TDM.DIN valid to TDM.CLK high
25
ns
T4
th(DIN-CLKH)
Hold time, TDM.DIN valid from TDM.CLK high
0
ns
(1)
Min = Minimum value
(2)
Max = Maximum value
Table 13-8 lists the master mode switching characteristics of the TDM interface.
Table 13-8. TDM Interface Master Mode Switching Characteristics
Notation
Parameter
Min(1)
Max(2)
Unit
T0
tc(CLK)
Cycle time, TDM.CLK (3)
1/64 * Fs
ns
T1
tw(CLK)
Pulse duration, TDM.CLK high or low(4)
0.45*P
0.55*P
ns
T2
td(CLKL-SYNC)
Delay time, TDM.CLK rising edge to TDM.SYNC transition
–10
10
ns
T5
td(CLKL-DOUT)
Delay time, TDM.CLK rising edge to TDM.DOUT transition
–10
12
ns
(1)
Min = Minimum value
(2)
Max = Maximum value
(3)
Fs = 8 to 48 kHz; 96 kHz for RX path only
(4)
P = TDM.CLK period
The PCM interface transfers voice data at 8-kHz (default narrowband mode) or 16-kHz (wideband mode)
sample rates. The CM interface can act as a slave or master. No PLL is used for the PCM interface, but
dividers are used to derive the 8- or 16-kHz clock from HFCLKIN (only when HFCLKIN = 26 MHz). If the
system master clock is not 26 MHz, the voice PCM interface is not available.
For the Bluetooth interface, the PCM is supported to transfer voice data to the Bluetooth chip at 8-kHz
(default narrowband mode) or 16-kHz sample rate.
The TPS65950 acts as a master for the Bluetooth interface. The frame synchronization and the bit clock
are shared from the voice PCM interface. If the system master clock is not 26 MHz, the Bluetooth
interface is not available.
Two modes are available for the PCM interfaces: mode 1 (writing on the PCM_VCK rising edge) and
mode 2 (writing on the PCM_VCK falling edge).
Table 13-9 and Table 13-10 assume testing over the recommended operating conditions (see Figure 13-5
Figure 13-5. Voice/BT PCM Interface—Master Mode (Mode 1)
Timing Requirements and Switching Characteristics
149
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