參數(shù)資料
型號(hào)： ST72C254G2M6
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
中文描述： 8位單電壓閃存微控制器。 ADC的。 16位定時(shí)器。的SPI。
文件頁(yè)數(shù)： 69/140頁(yè)
文件大?。?/td> 1349K
代理商： ST72C254G2M6
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ST72104G, ST72215G, ST72216G, ST72254G
34/140
I/O PORTS (Cont’d)
10.4 LOW POWER MODES
10.5 INTERRUPTS
The external interrupt event generates an interrupt
if the corresponding configuration is selected with
DDR and OR registers and the I-bit in the CC reg-
ister is reset (RIM instruction).
10.6 REGISTER DESCRIPTION
DATA REGISTER (DR)
Port x Data Register
PxDR with x = A, B or C.
Read /Write
Reset Value: 0000 0000 (00h)
Bit 7:0 = D[7:0]
Data register 8 bits.
The DR register has a specific behaviour accord-
ing to the selected input/output configuration. Writ-
ing the DR register is always taken into account
even if the pin is configured as an input; this allows
always having the expected level on the pin when
toggling to output mode. Reading the DR register
returns either the DR register latch content (pin
configured as output) or the digital value applied to
the I/O pin (pin configured as input).
DATA DIRECTION REGISTER (DDR)
Port x Data Direction Register
PxDDR with x = A, B or C.
Read /Write
Reset Value: 0000 0000 (00h)
Bit 7:0 = DD[7:0]
Data direction register 8 bits.
The DDR register gives the input/output direction
configuration of the pins. Each bit is set and
cleared by software.
0: Input mode
1: Output mode
OPTION REGISTER (OR)
Port x Option Register
PxOR with x = A, B or C.
Read /Write
Reset Value: 0000 0000 (00h)
Bit 7:0 = O[7:0]
Option register 8 bits.
For specific I/O pins, this register is not implement-
ed. In this case the DDR register is enough to se-
lect the I/O pin configuration.
The OR register allows to distinguish: in input
mode if the pull-up with interrupt capability or the
basic pull-up configuration is selected, in output
mode if the push-pull or open drain configuration is
selected.
Each bit is set and cleared by software.
Input mode:
0: Floating input
1: Pull-up input with or without interrupt
Output mode:
0: Output open drain (with P-Buffer deactivated)
1: Output push-pull (when available)
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
70
D7
D6
D5
D4
D3
D2
D1
D0
70
DD7
DD6
DD5
DD4
DD3
DD2
DD1
DD0
70
O7
O6
O5
O4
O3
O2
O1
O0
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72C254G2M6 制造商:STMicroelectronics 功能描述:8BIT MCU FLASH 8K 72C254 SOIC28
ST72C254G2M6/TR 制造商:ST 功能描述:0
ST72C254G2M6E 制造商:STMicroelectronics 功能描述:8K S028 LEADFREE - Rail/Tube
ST72C314J2B1 制造商:STMicroelectronics 功能描述:ST72FLASH 8K - Bulk
ST72C314J2T6 功能描述:8位微控制器 -MCU Flash 16K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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