參數(shù)資料
型號(hào)： MSM6789
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： SBC Solid-State Recorder IC
中文描述： 西南貝爾固態(tài)記錄器集成電路
文件頁(yè)數(shù)： 10/53頁(yè)
文件大?。?/td> 813K
代理商： MSM6789
MSM6789A/6789L
Semiconductor
PIN DESCRIPTIONS (for MSM6789A (5 V Version)) (Continued)
Symbol Type
Description
BRO
BR1
I
Bit Rate Selection.
This pin selects one of the following three types of bit rate (master
clock frequency f
OSC
= 8.192 MHz). This pin is invalid during the ROM playback operation.
PDMD
*1
I
Transition to the Power-down State.
Low level: The MSM6789A automatically goes to the power-down state, except
when the record/playback operation is performed.
High level: The MSM6789A automatically goes to the standby state, instead of the
power-down state, except when the record/playback operation
is performed. In this case, the MSM6789A can be placed in the
power-down state by setting the RESET or PDWN pin to a high level.
If an external circuit is used for the built-in LPF, this standby mode
must be selected by applying a high level to the PDMD pin.
VD0-VD3
I
These pins set the voice detect level for the voice triggered starting and unvoiced-part
elimination.
This pin selects the voice triggered starting or the unvoiced-part elimination.
Voice triggered starting:
Input a High level to the VDS pin. Then set the voice
detect level with VD0 to VD3 pins.
Unvoiced-part elimination:Input a Low level to the VDS pin. Then set the voice
detect level with VD0 to VD3 pins.
VDS
I
BR1
BR0
Bit rate
L
L
16.0 kbps
L
H
H
H
L
H
12.6 kbps
10.0 kbps
Unused
This pin outputs a high level while the record/playback operation is being performed.
Output to indicate the enable or disable state of the operation for specifying a
phrase. When continuous ROM playback is performed, the next phrase can
be specified after the NAR pin goes to high positively.
MON
O
NAR
O
Pin
35
36
33
67-70
38
72
71
Note: When neither the voice triggered starting nor the unvoiced-part elimination is
used, input a Low level to VD0 to VD3.
*1 When DRAM is selected, be sure to set the PDMD pin to a High level.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MSM6789A 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:SBC Solid-State Recorder IC
MSM6789L 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:SBC Solid-State Recorder IC
MSM6791 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:DRAM Interface IC
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