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參數資料
型號: Q67121C2168A1
英文描述: IC-SM-16 BIT CPU
中文描述: 集成電路的Sm - 16位CPU
文件頁數: 37/121頁
文件大?。?/td> 1000K
代理商: Q67121C2168A1
Semiconductor Group
6-3
On-Chip Peripheral Components
C501
Port 1, 2 and 3 output drivers have internal pullup FET’s (see
figure 6-5
). Each I/O line can be used
independently as an input or output. To be used as an input, the port bit stored in the bit latch must
contain a one (1) (that means for
figure 6-5
: Q=0), which turns off the output driver FET n1. Then,
for ports 1, 2 and 3, the pin is pulled high by the internal pullups, but can be pulled low by an external
source. When externally pulled low the port pins source current (
I
IL
or
I
TL
). For this reason these
ports are sometimes called “quasi-bidirectional”.
Figure 6-5
Basic Output Driver Circuit of Ports 1, 2, and 3
MCS01823
D
CLK
Bit
Latch
Q
Q
Internal
Pull Up
Arrangement
Pin
Read
Latch
to
Latch
Read
Pin
Write
V
CC
Int. Bus
n1
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相關代理商/技術參數
參數描述
Q67121C452 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-8-BIT CPU-12MHZ
Q67121-C848 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller
Q67121-C862 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:C16x-Family of High-Performance CMOS 16-Bit Microcontrollers
Q67121-C900 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller
Q67121-C923 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:C16x-Family of High-Performance CMOS 16-Bit Microcontrollers
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