参数资料
型号: SAB-C515-L24N
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 24 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 106/162页
文件大小: 771K
代理商: SAB-C515-L24N
Semiconductor Group
6-5
On-Chip Peripheral Components
C515
6.1.2.1
Port 0 Circuitry
Port 0, in contrast to ports 1 to 4, is considered as "true" bidirectional, because the port 0 pins float
when configured as inputs. Thus, this port differs in not having internal pullups. The pullup FET in
the P0 output driver (see figure 6-3) is used only when the port is emitting 1’s during the external
memory accesses. Otherwise, the pullup is always off. Consequently, P0 lines that are used as
output port lines are open drain lines. Writing a "1" to the port latch leaves both output FETs off and
the pin floats. In that condition it can be used as high-impedance input. If port 0 is configured as
general I/O port and has to emit logic high-level (1), external pullups are required.
Figure 6-3
Port 0 Circuitry
MCS02434
D
CLK
Bit
Latch
Control
Addr./Data
MUX
Pin
Read
Latch
Bus
Latch
Read
Pin
Write to
V
CC
Int.
&
Port
=1
Q
相关PDF资料
PDF描述
SAF-C515-RM 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP80
SAF-C515-LN 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68
SAH-C515-LN 8-BIT, 16 MHz, MICROCONTROLLER, PQCC68
SAB-C515-LM 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
SAB-C515C-LM 8-BIT, 10 MHz, MICROCONTROLLER, PQFP80
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