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參數(shù)資料
| 型號： | T48C862x-Rf-TNS |
| 廠商： | Atmel Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | Microcontroller with UHF ASK/FSK Transmitter |
| 中文描述： | 微控制器，帶有超高頻ASK / FSK發(fā)射器 |
| 文件頁數(shù)： | 35/108頁 |
| 文件大?。?/td> | 1023K |
| 代理商： | T48C862X-RF-TNS |
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35
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
Port 2 Data Register (P2DAT)
Primary register address: "2"hex
* Bit 3 -> MSB, Bit 0 -> LSB
Port 2 Control Register (P2CR)
Auxiliary register address: "2"hex
Value: 1111b means all pins in input mode
Table 10.
Port 2 Control Register
Code
3 2 1 0
x x x 1
x x x 0
x x 1 x
x x 0 x
x 1 x x
x 0 x x
1 x x x
0 x x x
Bi-directional Port 5
As all other bi-directional ports, this port includes a bitwise programmable Control Reg-
ister (P5CR), which allows the individual programming of each port bit as input or
output. It also opens up the possibility of reading the pin condition when in output mode.
This is a useful feature for self testing and for serial bus applications.
The port pins can also be used as external interrupt inputs (see Figure 30 on page 36
and Figure 31 on page 36). The interrupts (INT1 and INT6) can be masked or indepen-
dently configured to trigger on either edge. The interrupt configuration and port direction
is controlled by the Port 5 Control Register (P5CR). An additional low resistance pull-
up/pull-down transistor mask option provides an internal bus pull-up for serial bus
applications.
The Port 5 Data Register (P5DAT) is I/O mapped to the primary address register of
address "5"h and the Port 5 Control Register (P5CR) to the corresponding auxiliary
register. The P5CR is a byte-wide register and is configured by writing first the low
nibble and then the high nibble (see section “Addressing Peripherals” on page 30).
Bit 3 *
Bit 2
Bit 1
Bit 0
P2DAT3
P2DAT2
P2DAT1
P2DAT0
Reset value: 1111b
Bit 3
Bit 2
Bit 1
Bit 0
P2CR3
P2CR2
P2CR1
P2CR0
Reset value: 1111b
Function
BP20 in input mode
BP20 in output mode
BP21 in input mode
BP21 in output mode
BP22 in input mode
BP22 in output mode
BP23 in input mode
BP23 in output mode
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