參數(shù)資料
型號(hào): UPD9611GT
廠商: NEC Corp.
元件分類: Codec
英文描述: FOUR-CHANNEL PCM CODEC
中文描述: 四通道的PCM編解碼器
文件頁數(shù): 8/28頁
文件大小: 161K
代理商: UPD9611GT
μ
PD9611
8
(3) A-law/
μ
-law control
The
μ
PD9611 has the following two methods for A-law/
μ
-law control.
Sets LAW pin to high or low level.
Inputs 8-bit setting data from SP
DATA
pin (see
(5) Control of SP
DATA
pin
).
Internal data is the logical sum of LAW pin state and 8-bit setting data input.
If the internal data is 0, the
μ
PD9611 enters A-law mode. If the internal data is 1, the
μ
PD9611 enters
μ
-law mode.
8-Bit Setting Data
LAW Pin
Internal Data
0
0
0
1
0
1
0
1
1
1
1
1
Remark
0: A-law, 1:
μ
-law
(4) Gain Setting control for transmit/receive
The
μ
PD9611 can control gain settings independently for the transmit/receive by inputting 8-bit setting
data (see
(5) Control of SP
DATA
pin
) from the SP
DATA
pin for four channels. Gain can be set from +7.5
to –8.0 dB for the transmit and +0.0 dB t o –15.5 dB for the receive in 0.5 dB steps.
8-bit setting data input from SP
DATA
pin specifies the channel set in the first 8 bits, and performs selection
of transmit/receive and gain setting in the second 8 bits.
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