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參數(shù)資料
| 型號(hào)： | ST52514G1 |
| 英文描述： | IC MAX 7000 CPLD 32 44-TQFP |
| 中文描述： | 8位重癥監(jiān)護(hù)病房，10位ADC。兩個(gè)定時(shí)器/脈寬調(diào)制。 I2C總線。的SPI。脊髓損傷。提供了8K閃存 |
| 文件頁(yè)數(shù)： | 58/106頁(yè) |
| 文件大?。?/td> | 1355K |
| 代理商： | ST52514G1 |
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8.5 Alternate Functions
The Alternate Function allows the pins to be
connected with the peripheral signals or NMI. Not
all
Port
pins
have
an
Alternate
Function
associated.
A Configuration Register (PORT_x_AF) for each
Port is used to switch from the Digital I/O function
or the Alternate Function.
NMI is considered an Alternate Function. For this
reason
an
NMI
interrupt
request
can’t
be
generated unless the PA7 pin is configured in
Alternate Function and in one of the Input modes.
When an on-chip peripheral is configured to use a
pin, the correct I/O mode of the related pin should
be selected by selecting one of the appropriate
modes. See the Registers description in order to
obtain the right configurations.
Some peripherals,
as for example the I2C
peripheral, directly drive the pin configuration
according to the current function, overriding the
user configuration.
8.6 Register Description
In order to configure the Port’s pins, the three
Configuration
Registers
PORT_x_PULLUP,
PORT_x_OR
and
PORT_x_DDR
must
be
configured. The combination of these three
registers
determine
the
pin’s
configuration,
according to the scheme shown in Table 8.1.
In order to select between the digital functions or
Alternate functions PORT_x_AF register must be
configured. Each bit of the configuration registers
configures the pin of the corresponding position
(example: PORT_A_DDR bit 5 configures the pin
PA5).
Figure 8.2 Port Pin Architecture
CONF. REG.
D
E
C
O
D
E
R
FF
REGISTER
FILE
ALTERNATE
FUNCTION
INTERRUPT
POLARITY
IRQ
TO INPUT
REGISTER
Vdd
DIGITAL
PORT PIN
INT
PU
SEL
EN
ENABLE
DATA
CONF. REG.
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相關(guān)代理商/技術(shù)參數(shù) |
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| ST52514G3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
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| ST52514K3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT ICU WITH 10-BIT ADC. TWO TIMERS/PWM. I2C. SPI. SCI. UP TO 8K FLASH |
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