參數(shù)資料
型號(hào): T8531
元件分類: Codec
英文描述: T8502 and T8503 Dual PCM Codecs with Filters
中文描述: T8502和T8503雙的PCM編解碼器與濾波器
文件頁(yè)數(shù): 37/48頁(yè)
文件大小: 999K
代理商: T8531
Lucent Technologies Inc.
37
Preliminary Data Sheet
November 2000
Codec Chip Set
T8531/T8532 Multichannel Programmable
Software Interface
(continued)
Table 27. T8532 Control Register 1: Digital Loopback
Table 28. Bit Map for T8532 All Channel Test Register at 0x1510 and 0x1550
Table 29. Bits 3:0 of T8532 All Channel Test Register at 0x1510 and 0x1550
Notes:
Read out address provides the previous read or write address to CDO whenever a new address is being written into the register.
When analog loopback is high, data that enters the analog transmit path (VTX) is converted to a 1.024 MHz digital bit stream and routed back
to the analog receive path (VRP, VRN). The output of the transmit path is available on the oversampled data interface, but receive path over-
sampled data is ignored.
5-5134 (F)
When digital loopback is high, oversampled data receive (OSDR) is routed to oversampled data transmit (OSDX). The receive signal is propa-
gated to VRN/VRP, but any transmit signal from VTX is disconnected. A reference voltage on VRTX is still required in this mode.
5-5135 (F)
Bit 0
LPBK
0
1
Mode
Normal operation
Digital loopback
Bit Number and Function
2
Reserved
15—4
Not used
3
1
0
Read out address
Analog loopback
Digital loopback
Bit Number
Function
3
0
1
2
0
1
1
0
1
0
0
1
Normal operation
Read out address
Reserved
Normal operation
Normal operation
Analog loopback
Normal operation
Digital loopback
OVERSAMPLED
DATA
INTERFACE
A/D, D/A
VTX
VRP
OSDX
OSDR
OVERSAMPLED
DATA
INTERFACE
A/D, D/A
VTX
VRP
OSDX
OSDR
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