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參數資料
| 型號： | R5F2L387CDFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件頁數： | 51/74頁 |
| 文件大?。?/td> | 959K |
| 代理商： | R5F2L387CDFP |
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56
2588F–AVR–06/2013
ATtiny261/461/861
10.1
Ports as General Digital I/O
The ports are bi-directional I/O ports with optional internal pull-ups. Figure 10-2 shows a func-
tional description of one I/O-port pin, here generically called Pxn.
Figure 10-2. General Digital I/O
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.
10.1.1
Configuring the Pin
Each port pin consists of three register bits: DDxn, PORTxn, and PINxn. As shown in “Register
Description” on page 69, 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
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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相關代理商/技術參數 |
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| R5F2L387CNFA#V0 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH |
| R5F2L387CNFP#30 | 制造商:Renesas Electronics Corporation 功能描述:R8C/L38C FL-48K, PLQP0080KB-A - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH 80LQFP |
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| R5F2L387MNFA#V0 | 制造商:Renesas Electronics Corporation 功能描述:R8C/L38M 48+4/6 80LQFP 14X14 -20 TO +85 - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH 80LQFP |
| R5F2L387MNFP#30 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH 80LQFP |
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