參數(shù)資料
型號(hào)： PCF50732
廠商： NXP Semiconductors N.V.
英文描述： Baseband and audio interface for GSM
中文描述： 用于GSM基帶和音頻接口
文件頁(yè)數(shù)： 30/64頁(yè)
文件大小： 322K
代理商： PCF50732
1999 May 03
30
Philips Semiconductors
Objective specification
Baseband and audio interface for GSM
PCF50732
12.3.7
V
OICE BAND VOLUME REGISTER
Voice band gain settings can be independently programmed for: TXPGA, RXPGA, RXVOL and SidePGA.
Table 23
Voice band volume register (address 1011 and subaddresses)
X = don’t care during a read/or write access.
Table 24
Voice band volume registers value description
Note
1.
Possible gain settings are listed in Table 25 or can be calculated using the following formulae (‘n’ is an integer that
represents the value that is written into the register; n = 0 to 63):
a) RXPGA and TXPGA:
; add 6.02 dB to each gain for RXPGA and TXPGA settings.
b) RXVOL and SidePGA:
FUNCTION
SUBADDRESS
VALUE
SELECTED
RANGE
DEFAULT
SETTING
11
(s2)
10
(s1)
9
(s0)
8
7
6
5
4
3
2
1
0
TXPGA gain
RXPGA gain
RXVOL gain
SidePGA gain
Band gap setting level
Experimental bits
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
a
a
a
a
a
dir
b
b
b
b
b
pll
c
c
c
c
c
d
d
d
d
X
e
e
e
e
X
f
f
f
f
24 to +12 dB
0 dB
30 to +6 dB
12 dB
mute
X
100 to +75 mV 0 mV offset
dc
vbch hclk bgb
pll on, all
others off
VALUE
REMARKS
DESCRIPTION
TXPGA gain
RXPGA gain
microphone calibration
earphone calibration
TXPGA and RXPGA settings use the 6-bit binary fixed point value
‘a(chǎn)b.cdef’ as a multiplier for each PCM-sample. This results in a
control range of +12 to
24 dB. See note 1a.
customer volume control RXVOL and SidePGA settings use the 6-bit binary fixed point
value ‘a(chǎn).bcdef’ as a multiplier for each PCM-sample. This results
in a control range of +6 to
30 dB (and mute). See note 1b.
dir: bypass clock buffer
pll: clock optimizer
dc: bypass clock capacitor
vbch: voice band chopping
hclk: 26 MHz master clock input
bgb: band gap boost
do not use
RXVOL gain
SidePGA gain
Experimental bits
Band gap setting level
gain
20
16
n
log
×
=
gain
20
32
--n
log
×
=
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