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| 型号： | PSD4235G2V-A-20B81 |
| 厂商： | 意法半导体 |
| 英文描述： | Tantalum Electrolytic Capacitor; Capacitance:100uF; Capacitance Tolerance:+/- 20 %; Working Voltage, DC:10V; Package/Case:7343-31; Terminal Type:PCB SMT; ESR:0.0055ohm; Dielectric Material:Tantalum; Operating Temp. Max:105 C |
| 中文描述： | Flash在系统可编程外设的16位微控制器 |
| 文件页数： | 50/93页 |
| 文件大小： | 503K |
| 代理商： | PSD4235G2V-A-20B81 |
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Preliminary Information
PSD4000 Series
Drive
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
Port A
Open
Drain
Port B
Open
Drain
Port C
Slew
Rate
Port D
Open
Drain
Port E
Open
Drain
Port F
Slew
Rate
Port G
Open
Drain
Table 22. Drive Register Pin Assignment
The
PSD4000
Functional
Blocks
(cont.)
9.4.3.3 Drive Select Register
The Drive Select Register configures the pin driver as Open Drain or CMOS for some port
pins, and controls the slew rate for the other port pins. An external pull-up resistor should
be used for pins configured as Open Drain.
A pin can be configured as Open Drain if its corresponding bit in the Drive Select Register
is set to a ‘1’. The default pin drive is CMOS.
Aside: the slew rate is a measurement of the rise and fall times of an output. A higher
slew rate means a faster output response and may create more electrical noise. A pin
operates in a high slew rate when the corresponding bit in the Drive Register is set to ‘1’.
The default rate is slow slew.
Table 22 shows the Drive Register for Ports A, B, C, D, E, F and G. It summarizes which
pins can be configured as Open Drain outputs and which pins the slew rate can be set for.
51
9.4.4 Port Data Registers
The Port Data Registers, shown in Table 23, are used by the microcontroller to write data
to or read data from the ports. Table 23 shows the register name, the ports having each
register type, and microcontroller access for each register type. The registers are
described below.
9.4.4.1 Data In
Port pins are connected directly to the Data In buffer. In MCU I/O input mode, the pin input
is read through the Data In buffer.
9.4.4.2 Data Out Register
Stores output data written by the MCU in the MCU I/O output mode. The contents of the
Register are driven out to the pins if the Direction Register or the output enable
product term is set to “1”. The contents of the register can also be read back by the
microcontroller.
Register Name
Port
MCU Access
Data In
A,B,C,D,E,F,G
Read – input on pin
Data Out
A,B,C,D,E,F,G
Write/Read
Table 27. Port Data Registers
相关PDF资料 |
PDF描述 |
|---|---|
| PSD4235G2V-A-20B81I | Flash In-System-Programmable Peripherals for 16-Bit MCUs |
| PSD4235G2V-A-70M | Conductive Polymer Chip Capacitors / T520 Series - KO Cap; Capacitance [nom]: 150uF; Working Voltage (Vdc)[max]: 6.3V; Capacitance Tolerance: +/-20%; Dielectric: Conductive Polymer; ESR: 15mΩ; Lead Style: Surface-Mount Chip; Lead Dimensions: 7343-31; Termination: 100% Tin (Sn); Body Dimensions: 7.3mm x 4.3mm x 2.8mm; Temperature Range: -55C to +105C; Container: Tape & Reel; Qty per Container: 500; Features: Low ESR |
| PSD4235G2V-A-70MI | Flash In-System-Programmable Peripherals for 16-Bit MCUs |
| PSD4235G2V-A-70U | Flash In-System-Programmable Peripherals for 16-Bit MCUs |
| PSD4235G2V-A-70UI | Flash In-System-Programmable Peripherals for 16-Bit MCUs |
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