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參數(shù)資料
| 型號： | SAA4970T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Economical video processing IC ECOBENDIC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO56 |
| 封裝： | PLASTIC, SOT-190-1, VSOP-56 |
| 文件頁數(shù)： | 15/32頁 |
| 文件大?。?/td> | 179K |
| 代理商： | SAA4970T |
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1996 Oct 25
15
Philips Semiconductors
Preliminary specification
Economical video processing IC
(ECOBENDIC)
SAA4970T
ECO-WATCHDOG
The function of the watchdog is to reset the microcontroller
if it is not running the application properly. For this
purpose, the microcontroller program checks upon correct
operation and in case this is OK, it will periodically
generate a toggle of the BONE signal.
The watchdog will keep quiet as long as this toggling
interval is not longer than the duration of the watchdogs
“bone-edge to reset” time. The reset pulse is designed to
be long enough (32 XtalUP cycles) for the microcontroller
to reset, but must not remain active (HIGH) indefinitely.
Otherwise the microcontroller would be hung up in its reset
operation.
Control facilities
Table 1
Registers of the ECOBENDIC
REGISTER
BIT
NAME
FUNCTION
Registers 00H to 07H (column set)
00H
01H
02H
03H
04H
05H
06H
07H
0 to 7
0 to 7
0 to 7
0 to 7
0 to 7
0 to 7
0 to 7
0 to 7
set all registers of columns 0XH and 8XH
set all registers of columns 1XH and 9XH
set all registers of columns 2XH and AXH
set all registers of columns 3XH and BXH
set all registers of columns 4XH and CXH
set all registers of columns 5XH and DXH
set all registers of columns 6XH and EXH
set all registers of columns 7XH and FXH
Registers 08H and 09H (blanking)
08H
09H
0 to 7
0 to 7
set blanking
reset blanking
sets rising edge of signal BL when register data = CNT_F
sets falling edge of signal BL when register data = CNT_F
Registers 0AH and 0BH (interrupt)
0AH
0BH
0 to 8
0 to 8
set CB_intAb
set CD_intDb
CNT_B value when Acquisition B Interrupt (CB_intAb) is triggered
CNT_D value when Display Interrupt (CD_intDb) is triggered
Register 0CH (YUV control)
0CH
0
1
2
3
4
phase compensation
λ
value for phase compensation filter, bit 0
λ
value for phase compensation filter, bit 1
not used
Y clipping, 0 =
off
, 1 =
on
inverts UV signals after UV processing;
0 = no inversion, 1 = inversion
reformatter; 1 = binary, 0 = twos complement
reformatter; 1 = 8-bit quantization, 0 = 7-bit quantization
1 = pixel repetition, 0 = constant colour for framing
Y OUT
inv_UV
5
6
7
UVbin
UV8bit
Sel_PixRep
Registers 0DH and 0EH (H2 generation)
0DH
0EH
no data
no data
update start scan
update start flyback
after addressing rising edge of H2 is set
after addressing falling edge of H2 is set
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| SAA4974 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Besic without ADC |
| SAA4974H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Besic without ADC |
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| SAA4978H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Picture Improved Combined Network PICNIC |
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