参数资料
型号: PSD835G2V-A-20J
厂商: 意法半导体
英文描述: Configurable Memory System on a Chip for 8-Bit Microcontrollers
中文描述: 在8片位微控制器可配置存储系统
文件页数: 60/110页
文件大小: 570K
代理商: PSD835G2V-A-20J
PSD835G2
PSD8XX Family
59
The
PSD835G2
Functional
Blocks
(cont.)
Drive
Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Port A
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port B
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port C
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port D
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port E
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port F
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port G
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Table 23. Drive Register Pin Assignment
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 23 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.
相关PDF资料
PDF描述
PSD835G2V-A-20JI Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2V-A-20M Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2V-A-20MI Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2V-A-20U Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2V-A-20UI Configurable Memory System on a Chip for 8-Bit Microcontrollers
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