參數(shù)資料
型號: (Z)PSD813F1
英文描述: Flash In System Programmable Mirocomputer Peripherals(閃速,在系統(tǒng)可編程微控制器外圍器件,1M位閃速存儲器,256K位EEPROM,16K位SRAM)
中文描述: Flash在系統(tǒng)可編程Mirocomputer外設(shè)(閃速,在系統(tǒng)可編程微控制器外圍器件,100萬位閃速存儲器,256K位的EEPROM,16K的位的SRAM)
文件頁數(shù): 66/130頁
文件大小: 650K
代理商: (Z)PSD813F1
PSD813F Famly
Prelimnary
62
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
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port B
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Slew
Rate
Slew
Rate
Slew
Rate
Slew
Rate
Port C
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Open
Drain
Port D
NA
NA
NA
NA
NA
Slew
Rate
Slew
Rate
Slew
Rate
Table 27. Drive Register Pin Assignment
NOTE:
NA = Not Applicable.
The
PSD813F
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 27 shows the Drive Register for Ports A, B, C, and D. It summarizes which pins can
be configured as Open Drain outputs and which pins the slew rate can be set for.
相關(guān)PDF資料
PDF描述
(Z)PSD813F3 Flash In System Programmable Mirocomputer Peripherals(閃速,在系統(tǒng)可編程微控制器外圍器件,1M位閃速存儲器,16K位SRAM)
(Z)PSD813F2(中文) Flash In System Programmable Mirocomputer Peripherals(閃速,在系統(tǒng)可編程微控制器外圍器件,1M位和256K位閃速存儲器,16K位SRAM)
(Z)PSD813F3R(中文) Multi-Chip-Module to Monolithic Flash PSD(閃速,在系統(tǒng)可編程微控制器外圍器件,0M位閃速存儲器,無SRAM)
(Z)PSD813F2 Flash In System Programmable Mirocomputer Peripherals(閃速,在系統(tǒng)可編程微控制器外圍器件,1M位和256K位閃速存儲器,16K位SRAM)
(Z)PSD813F3R Multi-Chip-Module to Monolithic Flash PSD(閃速,在系統(tǒng)可編程微控制器外圍器件,0M位閃速存儲器,無SRAM)
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