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| 型号： | PICREF-1 |
| 英文描述： | SOT-23, Rail-to-Rail Output, Picoamp Input Current Precision Op Amp; Package: SOT; No of Pins: 5; Temperature Range: -40°C to +85°C |
| 中文描述： | PICREF - 2文件 |
| 文件页数： | 61/64页 |
| 文件大小： | 694K |
| 代理商： | PICREF-1 |
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63
CHAPTER 4
PIN FUNCTION (
PD780308Y SUBSERIES)
User’s Manual U11377EJ3V0UD
4.2.2 P10 to P17 (Port 1)
These are 8-bit I/O ports. Besides serving as I/O ports, they function as an A/D converter analog input.
The following operating modes can be specified in 1-bit units.
(1) Port mode
These ports function as 8-bit I/O ports. They can be specified as input or output ports in 1-bit units with port
mode register 1 (PM1). When they are used as input ports, internal pull-up resistors can be used by defining
pull-up resistor option register L (PUOL).
(2) Control mode
These ports function as A/D converter analog input pins (ANI0 to ANI7). The pull-up resistor is automatically
disabled when the pins are specified for analog input.
4.2.3 P25 to P27 (Port 2)
These are 3-bit I/O ports. Besides serving as I/O ports, they function as data I/O and clock I/O of the serial interface.
The following operating modes can be specified in 1-bit units.
(1) Port mode
These ports function as 3-bit I/O ports. They can be specified as input or output ports in 1-bit units with port
mode register 2 (PM2). When they are used as input ports, internal pull-up resistors can be used by defining
pull-up resistor option register L (PUOL).
(2) Control mode
These ports function as serial interface data I/O and clock I/O.
(a) SI0, SO0, SB0, SB1, SDA0, SDA1
Serial interface serial data I/O pins.
(b) SCK0, SCL
Serial interface serial clock I/O pins.
Caution When this port is used as a serial interface, the I/O and output latches must be set according
to the function used. For the setting, refer to Figure 16-4 Serial Operating Mode Register 0
Format.
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