參數(shù)資料
型號(hào)： ST72324BLK2BA/XXX
廠商： STMICROELECTRONICS
元件分類(lèi)： 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)： 89/151頁(yè)
文件大?。?/td> 1209K
代理商： ST72324BLK2BA/XXX
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ST72F324L, ST72324BL
42/151
I/O PORTS (Cont’d)
CAUTION: The alternate function must not be ac-
tivated as long as the pin is configured as input
with interrupt, in order to avoid generating spurious
interrupts.
Analog alternate function
When the pin is used as an ADC input, the I/O
must be configured as floating input. The analog
multiplexer (controlled by the ADC registers)
switches the analog voltage present on the select-
ed pin to the common analog rail which is connect-
ed to the ADC input.
It is recommended not to change the voltage level
or loading on any port pin while conversion is in
progress. Furthermore it is recommended not to
have clocking pins located close to a selected an-
alog pin.
WARNING: The analog input voltage level must
be within the limits stated in the absolute maxi-
mum ratings.
9.3 I/O PORT IMPLEMENTATION
The hardware implementation on each I/O port de-
pends on the settings in the DDR and OR registers
and specific feature of the I/O port such as ADC In-
put or true open drain.
Switching these I/O ports from one state to anoth-
er should be done in a sequence that prevents un-
wanted side effects. Recommended safe transi-
tions are illustrated in Figure 26 Other transitions
are potentially risky and should be avoided, since
they are likely to present unwanted side-effects
such as spurious interrupt generation.
Figure 26. Interrupt I/O Port State Transitions
9.4 LOW POWER MODES
9.5 INTERRUPTS
The external interrupt event generates an interrupt
if the corresponding configuration is selected with
DDR and OR registers and the interrupt mask in
the CC register is not active (RIM instruction).
Mode
Description
WAIT
No effect on I/O ports. External interrupts
cause the device to exit from WAIT mode.
HALT
No effect on I/O ports. External interrupts
cause the device to exit from HALT mode.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
External interrupt on
selected external
event
-
DDRx
ORx
Yes
01
floating/pull-up
interrupt
INPUT
00
floating
(reset state)
INPUT
10
open-drain
OUTPUT
11
push-pull
OUTPUT
XX
= DDR, OR
1
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相關(guān)代理商/技術(shù)參數(shù)
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ST72324BLK2T5 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3V range 8-bit MCU with 8 to 32K Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI interface
ST72324BLK2T6 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
ST72324BLK2TA 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
ST72324BLK4 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
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