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| 型號(hào)： | ST72141K2B3/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封裝： | 0.400 INCH, PLASTIC, SDIP-32 |
| 文件頁(yè)數(shù)： | 66/133頁(yè) |
| 文件大小： | 2615K |
| 代理商： | ST72141K2B3/XXX |
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ST72141K2
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7 MISCELLANEOUS REGISTER
The miscellaneous register allows control over
several different features such as the external in-
terrupts or the I/O alternate functions.
7.1 I/O Port Interrupt Sensitivity Description
The external interrupt sensitivity is controlled by
the ISxx bits of the Miscellaneous register. This
control allows to have two fully independent exter-
nal interrupt source sensitivities as shown in Fig-
Each external interrupt source can be generated
on four different events on the pin:
■ Falling edge
■ Rising edge
■ Falling and rising edge
■ Falling edge and low level
To guaranty correct functionality, a modification of
the sensitivity in the MISCR register must be done
only when the I bit of the CC register is set to 1 (in-
terrupt masked). See I/O port register and Miscel-
laneous register descriptions for more details on
the programming.
Figure 25. External Interrupt Sensitivity
7.2 I/O Port Alternate Functions
The MISCR register manages the SPI SS pin al-
ternate function configuration. This makes it possi-
ble to use the PB2 I/O port function while the SPI is
active.
These functions are described in detail in Section
7.3 Clock Prescaler Selection
The MISCR register is used to select the SLOW
mode (see Section 5.4 SLOW Mode for more de-
tails) and the SPI and Motor Control peripheral
clock prescaler.
EI0
INTERRUPT
SOURCE
IS00
IS01
MISCR
SENSITIVITY
CONTROL
PA7
PA0
PB7
PB0
IS10
IS11
MISCR
SENSITIVITY
CONTROL
EI1
INTERRUPT
SOURCE
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| ST72141K2B6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE |
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