參數(shù)資料
型號: MSM7502
廠商: OKI SEMICONDUCTOR CO., LTD.
元件分類: Codec
英文描述: Multi-Function PCM CODEC
中文描述: 多功能的PCM編解碼器
文件頁數(shù): 11/35頁
文件大?。?/td> 196K
代理商: MSM7502
Semiconductor
MSM7502
11/35
AD0, AD1
Address data inputs for the internal control registers.
Addressing of the internal control registers is executed by AD0 and AD1 and sub address data,
DB7 and DB6.
AD1 AD0 DB7 DB6
Function
0
0
0
0
1
0
1
0
ON/OFF controls of sounder, R-Tone, F-Tone
Level/Frequency controls of sounder, R-Tone
PB tone control
Controls of internal speech path switch and general latch
Watchdog timer reset
Controls of receive gain and side tone gain
Controls of transmit hold tone, PB tone, handfree input, handset inputs gain
Controls of speaker pre-amplifier gain and additional speaker gain
Controls of receive PAD and incoming tone input gain
Key scanning output control
Key scanning interrupt reset
LCD deflection angle control voltage setting
Power ON/OFF control
CODEC control (Controls of companding law and digital loop)
1
1
0
0
1
1
0
1
0
1
0
1
1
1
1
1
1
0
1
1
1
1
0
0
1
1
0
1
0
1
1
0
Key scanning data read-out
WRITE
READ
WRN
Write signal for internal control registers.
Data on the data bus is written into the registers at the rising edge of WRN under the condition
of digital "0" of CEN (Chip Enable). While CEN is in digital "1" state, WRN becomes invalid. The
Write cycle is a minimum of 2
m
s regardless of the presence or absence of clock signals.
RDN
Read signal input to read PI0 to PI7 out of the processor.
When CEN and RDN are in digital "0" state, the digital values on PI0 to PI7 are output onto the
data buses DB0 to DB7. While CEN is in digital "1" state, the RDN signal becomes invalid.
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