msm7584c Oki Semiconductor, msm7584c Datasheet - Page 42

• Manufacturer Part Number: msm7584c
• Description: Pi /4 Shift Qpsk Modem/adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
(7) CR6 (VOX Function Control)
(8) CR7 (Detect Register: Read-only)
Note:
CR7
Initial Value
CR6
Initial Value
B7: .............. VOX function ON/OFF
B6, B5: .......Transmit side voice/silence detector level settings
B4: .............. Hangover time (refer to Fig. 2) settings
B3: .............. Receive side VOX input signal
B2: .............. Receive side background noise level setting
B1, B0: .......External setting background noise level
B7: ........................... Transmit side voice/silence detection
B6, B5: .................... Transmit side silence level (indicator)
These outputs are enabled when the VOX function is turned ON by CR6 - B7.
B4 - B2: ................... Not used
B1: ........................... Serial register I/F monitoring.
B0: ........................... Monitors serial register recording and playback.
ON/OFF
VOX
OUT
VOX
B7
B7
0
0
(0,0): –20 dBm0
(1,0): –30 dBm0
(0,0): No noise
(1,0): –35 dBm0
0: Internal background noise transmit
When using this data, set the VOXI pin to "0".
0: Internal automatic setting
Internal automatic setting Æ Sets to the voice signal level when B3
(VOXI) changes from "1" to "0".
Silent Level
(0,0):Below –60 dBm0
(1,0): –40 to –50 dBm0
This bit monitors the Read and Write of addresses at the serial
register I/F.
0: Stop
0: Stop
LVL1
B6
B6
ON
1
0
0
Silent Level
LVL0
B5
B5
ON
0
0
0
1: Reading or Writing
1: Recording or Playing back
(0,1): –25 dBm0
(1,1): –35 dBm0
(0,1): –45 dBm0
(1,1): –25 dBm0
TIME
OFF
B4
—
B4
0
0
1: Externa setting (by B1, B0)
0: OFF
VOX
B3
—
B3
IN
0
0
0: 160 ms
(0,1): –50 to –60 dBm0
(1,1): Above –40 dBm0
1: Voice receive signal transmit
LEVEL SEL
RX NOISE
B2
—
B2
0
0
1: ON
0: Silence
RX NOISE
1: 320 ms
BUSY
LVL1
B1
B1
0
0
MSM7584C
1: Voice
RX NOISE
RPM
LVL0
B0
42/57
B0
0
0