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參數(shù)資料
| 型號(hào)： | UPC1854A |
| 廠商： | NEC Corp. |
| 英文描述： | I2C BUS-COMPATIBLE US MTS PROCESSING LSI |
| 中文描述： | I2C總線兼容美國(guó)的多邊貿(mào)易體制處理LSI |
| 文件頁(yè)數(shù)： | 28/48頁(yè) |
| 文件大?。?/td> | 251K |
| 代理商： | UPC1854A |
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μ
PC1854A
28
Data Sheet S12816EJ3V0DS00
4.4 Explanation of Read Register
(1) Power-on reset detection
Whether a power-on reset was detected is detected with bit D7 of the read register.
Figure 4-5. Power-On Reset Detection
(2) Stereo, SAP broadcast (broadcast status) detection
Whether SAP or stereo broadcast from a broadcasting station is being broadcast is detected with bits D5 and
D6 of the read register.
When a SAP signal (5 f
H
) or stereo pilot signal is detected, the register data becomes “1”.
Figure 4-6. Stereo, SAP Broadcast (Broadcast Status) Detection
D7
D6
D5
D4
D3
D2
D1
D0
Power-on
reset
Noise
detection
1
1
1
Broadcast status
Stereo
pilot
SAP
signal
Power-on reset detection
Power-on reset detection
Stereo
broadcast
reception
SAP
broadcast
reception
Reception status
0
1
0
1
D7
D6
D5
D4
D3
D2
D1
D0
Power-on
reset
Noise
detection
1
1
Broadcast status
Stereo
pilot
SAP
signal
Stereo
broadcast
reception
SAP
broadcast
reception
Reception status
Stereo pilot
SAP broadcast (SAP signal detected)
No SAP broadcast
SAP signal
No Stereo broadcast
Stereo broadcast (stereo pilot signal detected)
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