參數(shù)資料
型號(hào): ST72124J2B7
廠商: 意法半導(dǎo)體
英文描述: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
中文描述: 8位單電壓閃存,ADC和16位定時(shí)器,SPI和脊髓損傷界面微控制器
文件頁數(shù): 47/125頁
文件大?。?/td> 776K
代理商: ST72124J2B7
ST72334J/N, ST72314J/N, ST72124J
47/125
6.2 MISCELLANEOUS REGISTERS
The miscellaneous registers allow control over
several different features such as the external in-
terrupts or the I/O alternate functions.
6.2.1 I/O Port Interrupt Sensitivity Description
The external interrupt sensitivity is controlled by
the ISxx bits of the MISCR1 miscellaneous regis-
ter. This control allows to have two fully independ-
ent external interrupt source sensitivities.
Each external interrupt source can be generated
on four different events on the pin:
I
Falling edge
I
Rising edge
I
Falling and rising edge
I
Falling edge and low level
To guarantee correct functionality, the sensitivity
bits in the MISCR1 register must be modified only
when the I bit of the CC register is set to 1 (inter-
rupt masked). See I/O port register and Miscella-
neous register descriptions for more details on the
programming.
6.2.2 I/O Port Alternate Functions
The MISCR registers manage four I/O port miscel-
laneous alternate functions:
I
Main clock signal (f
CPU
) output on PF0
I
A beep signal output on PF1 (with 3 selectable
audio frequencies)
I
SPI pin configuration:
– SS pin internal control to use the PC7 I/O port
function while the SPI is active.
These functions are describedin detail in the Sec-
tion 6.2.3 Miscellaneous Registers Description.
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