Ask about ADC0809 control problem

fairwitchy

Ask about ADC0809 control problem [Copy link]

The program is as follows; why is ADC0809 always in a busy state (P[0..7] connected to D[0..7] P0 connected to the digital tube) #include
#define uchar unsigned char #define uint unsigned int uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //digital tube display code 0-9 sbit ST=P3^2; //conversion start signal sbit EOC=P3^1; //conversion end signal sbit OE=P3^0; //output enable signal void delay(uint time) { uint i,j; for(i=0;i

Check control timing

Timing. After START 0->1, there is a requirement for a 100-200ns delay before 1->0. What is the frequency of the clock CLKOCK?

500kHz

500kHz

Ask about ADC0809 control problem

magicxp

Check control timing

gxj0813

Timing. After START 0->1, there is a requirement for a 100-200ns delay before 1->0. What is the frequency of the clock CLKOCK?

zhuwy

500kHz

giftedxiaozhao

500kHz