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VCT3803A 参数 Datasheet PDF下载

VCT3803A图片预览
型号: VCT3803A
PDF下载: 下载PDF文件 查看货源
内容描述: 视频/控制/图文电视IC系列 [Video/Controller/Teletext IC Family]
分类和应用: 电视
文件页数/大小: 172 页 / 2219 K
品牌: MICRONAS [ MICRONAS ]
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VCT 38xxA  
ADVANCE INFORMATION  
5.18.Ports  
Table 5–23: Port pin configuration  
There exist different kinds of ports. The universal  
ports, P1 to P3, serve as digital I/O and have addi-  
tional special input and output functions. A subset of  
the universal ports (P10-P17, P20-P26) serves as  
input for the analog-to-digital converter. The I2C ports  
SDA, SCL can alternatively be used as digital I/O  
ports. The analog audio ports AIN13, AOUT12 can  
alternatively be used as digital input ports. The  
20.25 MHz system clock output CLK20 can alterna-  
tively be used as digital output port.  
Port  
Name  
ADC  
Input  
Special  
Output  
Special  
Input Port  
P10  
P11  
P12  
P13  
P14  
P15  
P16  
P17  
P20  
P21  
P22  
P23  
P24  
P25  
P26  
P27  
P30  
P31  
P32  
P33  
P34  
P35  
P36  
P37  
P40  
P41  
P42  
P43  
P44  
P45  
P46  
1
2
Timer 0  
Timer 1  
CC0OUT  
CC1OUT  
TVPWM  
PWM 0  
PWM 1  
PWM 2  
PWM 3  
CLK20  
SDA 2  
1
2
3
3
4
4
5
5
6
6
5.18.1.Port Assignment  
7
7
Table 5–23 shows the assignment of port pins to Spe-  
cial Input and Output functions.  
8
8
Every Special Output function is connected to 2 port  
pins in parallel and can be activated via the MOD flag  
in the corresponding port register.  
9
9
10  
11  
12  
13  
14  
15  
10  
11  
12  
The ADC input multiplexer can be connected to 1 of 15  
port pins. The output driver of the selected port pin is  
then forced to open-drain mode. Additionally it can be  
disabled using the EN flag in the corresponding port  
register.  
SCL 2  
Timer 0  
Timer 1  
CC0OUT  
CC1OUT  
TVPWM  
PWM 0  
PWM 1  
PWM 2  
PWM 3  
CLK20  
SDA 2  
Every special input function can be connected to 1 of  
15 input ports (see Table 5–22). If port number 0 is  
selected the special input function is connected to  
ground. Changing the input port may produce tempo-  
rary glitch signals. Therefore, the corresponding spe-  
cial input function should be disabled before the input  
port is changed.  
Table 5–22: Special input configuration  
Special  
Input  
Number  
Special  
Input  
Function  
Special  
Input  
Port  
1
2
3
4
5
6
CC0IN  
CC1IN  
PINT0  
PINT1  
PINT2  
PINT3  
015  
015  
015  
015  
015  
015  
SCL 2  
SDA  
SCL  
AOUT1  
AOUT2  
AIN1  
13  
AIN2  
14  
15  
AIN3  
126  
Micronas