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參數(shù)資料
| 型號(hào)： | ST10F269DIETR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, UUC |
| 封裝： | DIE |
| 文件頁(yè)數(shù)： | 121/161頁(yè) |
| 文件大?。?/td> | 1595K |
| 代理商： | ST10F269DIETR |
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12.3.1 - Alternate Functions of PORT0
When an external bus is enabled, PORT0 is used
as data bus or address/data bus.
Note that an external 8-bit demultiplexed bus only
uses P0L, while P0H is free for I/O (provided that
no other bus mode is enabled).
PORT0 is also used to select the system start-up
configuration. During reset, PORT0 is configured
to input, and each line is held high through an
internal pull-up device.
Each line can now be individually pulled to a low
level (see Section 21.3 - DC Characteristics)
through an external pull-down device. A default
configuration is selected when the respective
PORT0 lines are at a high level. Through pulling
individual lines to a low level, this default can be
changed
according
to
the
needs
of
the
applications.
The internal pull-up devices are designed in such
way that an external pull-down resistors (see Data
Sheet specification) can be used to apply a
correct low level.
These external pull-down resistors can remain
connected to the PORT0 pins also during normal
operation, however, care has to be taken in order
to not disturb the normal function of PORT0 (this
might be the case, for example, if the external
resistor value is too low).
With
the
end
of
reset,
the
selected
bus
configuration will be written to the BUSCON0
register.
The configuration of the high byte of PORT0, will
be copied into the special register RP0H. This
read-only register holds the selection for the
number of chip selects and segment addresses.
Software can read this register in order to react
according
to
the
selected
configuration,
if
required.
When the reset is terminated, the internal pull-up
devices are switched off, and PORT0 will be
switched to the appropriate operating mode.
During external accesses in multiplexed bus
modes
PORT0
first
outputs
the
16-bit
intra-segment address as an alternate output
function.
PORT0
is
then
switched
to
high-impedance input mode to read the incoming
instruction or data. In 8-bit data bus mode, two
memory cycles are required for word accesses,
the first for the low Byte and the second for the
high Byte of the Word.
During write cycles PORT0 outputs the data Byte
or Word after outputting the address. During
external accesses in demultiplexed bus modes
PORT0 reads the incoming instruction or data
Word or outputs the data Byte or Word.
Figure 21 : PORT0 I/O and Alternate Functions
P0H.7
P0H.6
P0H.5
P0H.4
P0H.3
P0H.2
P0H.1
P0H.0
P0L.7
P0L.6
P0L.5
P0L.4
P0L.3
P0L.2
P0L.1
P0L.0
PORT0
P0H
P0L
Alternate Function
a)
b)
c)
d)
General Purpose
Input/Output
8-bit
Demultiplexed Bus
16-bit
Demultiplexed Bus
8-bit
Multiplexed Bus
16-bit
Multiplexed Bus
D7
D6
D5
D4
D3
D2
D1
D0
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
A15
A14
A13
A12
A11
A10
A9
A8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST10F269-DP | 功能描述:16位微控制器 - MCU 16-bit MCU MAC 256 Kbyte Flash RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| ST10F269-DPB | 功能描述:16位微控制器 - MCU 16-bit MCU MAC 256 Kbyte Flash RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| ST10F269-DPR | 功能描述:16位微控制器 - MCU 16Bit MCU 256K BYTE FLASH,12K BYTE RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| ST10F269DT3 | 功能描述:16位微控制器 - MCU 16Bit MCU 256K BYTE FLASH,12K BYTE RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| ST10F269DTR3 | 功能描述:16位微控制器 - MCU 16-bit MCU MAC unit 256 Kbyte Flash RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
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