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参数资料
| 型号： | TC9028P |
| 元件分类： | 摇控器 |
| 英文描述： | INFRARED, TRANSMITTER IC, PDIP20 |
| 封装： | 0.300 INCH, 2.54 MM PITCH, PLASTIC, DIP-20 |
| 文件页数： | 21/21页 |
| 文件大小： | 571K |
| 代理商： | TC9028P |
TC9028P/F
2002-01-08
9
3.1.2
I/O ports
TC9028P and TC9028F has 4 I/O ports with 15 pins.
(1) Port P0: 4 bit input
(2) Ports P1, P2 : 4 bit programmable input/output
(3) Port P5: 3 bit output (P52 and P53 are for large current output)
(1)
Port P0 (P03~P00)
Port P0 is a 4 bit input port. All its pins are equipped with hold mode cancellation function.
(2)
Ports P1 (P13~P10), P2 (P23~P20)
Ports P1, P2 are 4 bit programmable I/O ports with latches.
Input or output can be selected by program. (8 types)
Latches are initialized to 1 at reset.
Pins which can be switched using an option to input mode during hold mode are equipped with hold
mode cancellation functions.
Figure 3.2 Ports P0, P1 and P2
(3)
P5 (P53~P51) port
Port P5 is a 3 bit output port with a latch.
P51 is for P-ch open-drain output. An option allows it to be used for push/pull output. The latch is
initialized to 0 at reset.
P52 is for large current output for driving the send display LED.
The output latch is initialized to 1 at reset.
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