參數(shù)資料
型號(hào): TDA938X
廠商: NXP Semiconductors N.V.
英文描述: TV signal processor-Teletext decoder with embedded m-Controller
中文描述: 電視信號(hào)處理器與嵌入式米圖文電視解碼器控制器
文件頁數(shù): 35/140頁
文件大?。?/td> 570K
代理商: TDA938X
Philips Semiconductors
Preliminary specification
1999 Sep 28
35
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA 935X/6X/8X series
.
I
NTERRUPT
V
ECTOR
A
DDRESS
The processor acknowledges an interrupt request by executing a hardware generated LCALL to the appropriate
servicing routine. The interrupt vector addresses for each source are shown in Table 9.
L
EVEL
/E
DGE
I
NTERRUPT
The external interrupt can be programmed to be either level-activated or transition activated by setting or
clearing the IT0/1 bits in the Timer Control SFR called TCON.
The external interrupt INT1 differs from the standard 80C51 in that it is activated on both edges when in edge
sensitive mode. This is to allow software pulse width measurement for handling remote control inputs.
Timer/Counter
Two 16 bit timers/counters are incorporated Timer0 and Timer1. Both can be configured to operate as either
timers or event counters.
In Timer mode, the register is incremented on every machine cycle. It is therefore counting machine cycles.
Since the machine cycle consists of 12 oscillator periods, the count rate is 1/12 Fosc = 1MHz.
In Counter mode, the register is incremented in response to a negative transition at its corresponding external
pin T0 or T1. Since the pins T0 and T1 are sampled once per machine cycle it takes two machine cycles to
recognise a transition, this gives a maximum count rate of 1/24 Fosc = 0.5MHz.
There are six special function registers used to control the timers/counters. These are:
Source
Priority
within level
Interrupt
Vector
EX0
Highest
0003H
ET0
-
000BH
EX1
-
0013H
ET1
-
001BH
ECC
-
0023H
ES2
-
002BH
EBUSY
Lowest
0033H
Table 9 Interrupt Priority (within same level)
ITx
Level
Edge
0
Active low
1
INT0 = Negative Edge
INT1 = Positive and Negative Edge
Table 10 External Interrupt Activation
相關(guān)PDF資料
PDF描述
TDA9829T Downconverter For DVB(下變頻器 (DVB應(yīng)用))
TDAT04622 TDAT SONET/SDH 155/622/2488 Mbits/s Data Interfaces
TDAT042G51A-3BLL1 TDAT SONET/SDH 155/622/2488 Mbits/s Data Interfaces
TE13004D Silicon NPN High Voltage Switching Transistor
TE13005D Silicon NPN High Voltage Switching Transistor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA9400 制造商:未知廠家 制造商全稱:未知廠家 功能描述:INTEGRATED CIRCUITS FOR TV AND RADIO RECEVERS
TDA9403 制造商:未知廠家 制造商全稱:未知廠家 功能描述:INTEGRATED CIRCUITS FOR TV AND RADIO RECEVERS
TDA9500 制造商:未知廠家 制造商全稱:未知廠家 功能描述:INTEGRATED CIRCUITS FOR TV AND RADIO RECEVERS
TDA9501 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AC COUPLING HIGH VOLTAGE VIDEO AMPLIFIER
TDA9503 制造商:未知廠家 制造商全稱:未知廠家 功能描述:INTEGRATED CIRCUITS FOR TV AND RADIO RECEVERS