參數(shù)資料
型號: Q67126-C2088
英文描述: RF inductor, ceramic core, 2% tol, SMT, RoHS
中文描述: 集成電路釤CAN控制器
文件頁數(shù): 41/121頁
文件大?。?/td> 1000K
代理商: Q67126-C2088
Semiconductor Group
6-7
On-Chip Peripheral Components
C501
6.1.1.1
Port 0 and Port 2 used as Address/Data Bus
As shown in
figure 6-7
and below in
figure 6-8
, the output drivers of ports 0 and 2 can be switched
to an internal address or address/data bus for use in external memory accesses. In this application
they cannot be used as general purpose I/O, even if not all address lines are used externally. The
switching is done by an internal control signal dependent on the input level at the EA pin and/or the
contents of the program counter. If the ports are configured as an address/data bus, the port latches
are disconnected from the driver circuit. During this time, the P2 SFR remains unchanged while the
P0 SFR has 1’s written to it. Being an address/data bus, port 0 uses a pullup FET as shown in
figure 6-7
. When a 16-bit address is used, port 2 uses the additional strong pullups p1 to emit 1’s
for the entire external memory cycle instead of the weak ones (p2 and p3) used during normal port
activity.
Figure 6-8
Port 2 Circuitry
MCS02123
D
CLK
Bit
Latch
Q
Q
Control
Addr.
MUX
Internal
Pull Up
Arrangement
V
CC
Port
Pin
Int. Bus
Write to
Latch
Pin
Read
Latch
Read
=1
相關(guān)PDF資料
PDF描述
Q67127-C2036SAB-C161R1-L16M IC-SM-16 BIT CPU
Q67120-C2200 16-Bit Single-Chip Microcontroller Bare Die Delivery
Q67120-C1054 High Speed CMOS Logic Triple 3-Input NOR Gates 14-SOIC -55 to 125
Q67120-C1056 High Speed CMOS Logic Triple 3-Input NOR Gates 14-SOIC -55 to 125
Q67120-C2002 High Speed CMOS Logic Octal D-Type Flip-Flops with Reset 20-SOIC -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
Q67127-C1009 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
Q67127-C1014 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
Q67127-C1030 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
Q67127-C1031 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller
Q67127-C1032 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller