参数资料
型号: PIC16C433T-I/SO
厂商: Microchip Technology
文件页数: 82/126页
文件大小: 0K
描述: IC MCU CMOS 8BIT 10MHZ 2K 18SOIC
标准包装: 1,100
系列: PIC® 16C
核心处理器: PIC
芯体尺寸: 8-位
速度: 10MHz
连通性: LIN(本地互连网络)
外围设备: POR,WDT
输入/输出数: 5
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: OTP
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 18-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
59
4378C–AVR–09/08
AT90PWM1
11.2
Ports as General Digital I/O
The ports are bi-directional I/O ports with optional internal pull-ups. Figure 11-2 shows a func-
tional description of one I/O-port pin, here generically called Pxn.
Figure 11-2.
General Digital I/O(1)
Note:
1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clk
I/O,
SLEEP, and PUD are common to all ports.
11.2.1
Configuring the Pin
Each port pin consists of three register bits: DDxn, PORTxn, and PINxn. As shown in “Register
Description for I/O-Ports” on page 72, the DDxn bits are accessed at the DDRx I/O address, the
PORTxn bits at the PORTx I/O address, and the PINxn bits at the PINx I/O address.
The DDxn bit in the DDRx Register selects the direction of this pin. If DDxn is written logic one,
Pxn is configured as an output pin. If DDxn is written logic zero, Pxn is configured as an input
pin.
If PORTxn is written logic one when the pin is configured as an input pin, the pull-up resistor is
activated. To switch the pull-up resistor off, PORTxn has to be written logic zero or the pin has to
be configured as an output pin
The port pins are tri-stated when reset condition becomes active, even if no clocks are running.
clk
RPx
RRx
RDx
WDx
PUD
SYNCHRONIZER
WDx: WRITE DDRx
WRx: WRITE PORTx
RRx:
READ PORTx REGISTER
RPx:
READ PORTx PIN
PUD: PULLUP DISABLE
clk
I/O : I/O CLOCK
RDx:
READ DDRx
D
L
Q
RESET
Q
D
Q
D
CLR
PORTxn
Q
D
CLR
DDxn
PINxn
D
ATA
B
U
S
SLEEP
SLEEP: SLEEP CONTROL
Pxn
I/O
WPx
0
1
WRx
WPx: WRITE PINx REGISTER
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