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參數(shù)資料
| 型號： | SAA55XX |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD) |
| 中文描述： | 與隱藏字幕（CC）和屏幕顯示（OSD電視微控制器） |
| 文件頁數(shù)： | 21/84頁 |
| 文件大小： | 352K |
| 代理商： | SAA55XX |
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2000 Feb 23
21
Philips Semiconductors
Preliminary specification
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
SAA55xx
SI
Serial Interrupt flag.
This flag is set and an interrupt request is generated, after
any of the following events occur:
A START condition is generated in master mode
The own slave address has been received during AA = 1
The general call address has been received while S1ADR.GC and AA = 1
Adatabytehasbeenreceivedortransmittedinmastermode(evenifarbitration
is lost)
A data byte has been received or transmitted as selected slave
A STOP or START condition is received as selected slave receiver or
transmitter. While the SI flag is set, SCL remains LOW and the serial transfer is
suspended. SI must be reset by software.
Assert Acknowledge flag.
When this bit is set, an acknowledge is returned
after any one of the following conditions:
Own slave address is received
General call address is received (S1ADR.GC = 1)
A data byte is received, while the device is programmed to be a master receiver
A data byte is received, while the device is selected slave receiver.
When the bit is reset, no acknowledge is returned. Consequently, no interrupt is
requested when the own address or general call address is received.
AA
I
2
C-bus Data Register (S1DAT)
DAT7 to DAT0
I
2
C-bus data
I
2
C-bus Status Register (S1STA)
STAT4 to STAT0
I
2
C-bus interface status
Software ADC Register (SAD)
VHI
CH1 to CH0
analog input voltage greater than DAC voltage (logic 1)
ADC input channel select; CH<1:0>:
00 = ADC3
01 = ADC0
10 = ADC1
11 = ADC2
initiate voltage comparison between ADC input channel and SAD value
4 MSBs of DAC input word
ST
(1)
SAD7 to SAD4
Software ADC Control Register (SADB)
DC_COMP
SAD3 to SAD0
enable DC comparator mode (logic 1)
4 LSBs of SAD value
Stack Pointer (SP)
SP7 to SP0
stack pointer value
BIT
FUNCTION
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