參數(shù)資料
型號(hào)： IDT821064PQF
廠(chǎng)商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi)： 編解碼器
英文描述： QUAD PROGRAMMABLE PCM CODEC WITH GCI INTERFACE
中文描述： A/MU-LAW, PROGRAMMABLE CODEC, PQFP64
封裝： PLASTIC, QFP-64
文件頁(yè)數(shù)： 23/33頁(yè)
文件大?。?/td> 510K
代理商： IDT821064PQF
23
INDUSTRIAL TEMPERATURE RANGE
IDT821064 QUAD PROGRAMMABLE PCM CODEC WITH GCI INTERFACE
19. Level Meter Channel Select, Linear/Compressed, Level Meter On/off (34H/B4H), Read/Write
Level Meter On/off bit (LMO) enables/disable the level meter.
LMO = 0: Level meter is disabled (default);
LMO = 1: Level meter is enabled.
Linear/Compressed bit (L/C) determines the mode of level meter operation.
L/C = 0: Message mode is selected, compressed PCM will be output to LVLH transparently (default ).
L/C = 1: Metering mode is selected, linear PCM data will be metered and output to LVLH and LVLL, when data_ready bit in LVLL register
is ‘1’.
Level Meter Channel Select bits (CS[1:0]) select the channel, data on which will be level metered.
CS[1:0] = 00: Channel 1 is selected (default);
CS[1:0] = 01: Channel 2 is selected;
CS[1:0] = 10: Channel 3 is selected;
CS[1:0] = 11: Channel 4 is selected;
20. Loop Control and PLL Power Down (35H/B5H), Read/Write
PLL Power Down bit (PPD) controls the operation of Phase Lock Loop.
PPD = 0: PLL disable, the device is in normal operation (default);
PPD = 1: PLL is powered down. The device works in Power-Saving mode. All clocks stop running.
Loop Control bits determine the loopback status. Refer to Figure 6 for details.
DLB_ANA = 0: Digital Loopback via Analog Interface is disabled (default);
DLB_ANA = 1: Digital Loopback via Analog Interface is enabled;
ALB_8k = 0: Analog Loopback via 8 kHz Interface is disabled (default);
ALB_8k = 1: Analog Loopback via 8 kHz Interface is enabled;
DLB_8k = 0: Digital Loopback via 8 kHz Interface is disabled (default);
DLB_8k = 1: Digital Loopback via 8 kHz Interface is enabled;
DLB_DI = 0: Digital Loopback from DR to DX is disabled (default);
DLB_DI = 1: Digital Loopback from DR to DX is enabled;
ALB_DI = 0: Analog Loopback from DX to DR is disabled (default);
ALB_DI = 1: Analog Loopback from DX to DR is enabled.
21. Over-sampling Timing Tuning (37H/B7H), Read/Write
To improve the performance of total distortion, it is recommended to write a data byte of 40H to this Global Register. The default value is 00H.
b7
R
/W
R
b6
0
R
b5
1
R
b4
1
R
b3
0
b2
1
L/C
b1
0
b0
0
Command
I/O data
LMO
CS[1]
CS[0]
b7
R
/W
R
b6
0
R
b5
1
PPD
b4
1
b3
0
b2
1
b1
0
b0
1
Command
I/O data
DLB_ANA
ALB_8k
DLB_8k
DLB_DI
ALB_DI
b7
R
/W
b6
0
b5
1
b4
1
b3
0
b2
1
b1
1
b0
1
Command
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