参数资料
型号: ST72C254G1M3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDSO28
封装: 0.300 INCH, PLASTIC, SOIC-28
文件页数: 79/136页
文件大小: 929K
代理商: ST72C254G1M3
ST72104G, ST72215G, ST72216G, ST72254G
47/136
16-BIT TIMER (Cont’d)
Notes:
1. After a processor write cycle to the OC
iHR reg-
ister, the output compare function is inhibited
until the OC
iLR register is also written.
2. If the OC
iE bit is not set, the OCMPi pin is a
general I/O port and the OLVL
i bit will not
appear when a match is found but an interrupt
could be generated if the OCIE bit is set.
3. When the timer clock is fCPU/2, OCFi and
OCMP
i are set while the counter value equals
the OC
iR register value (see Figure 33 on page
48). This behaviour is the same in OPM or
PWM mode.
When the timer clock is fCPU/4, fCPU/8 or in
external clock mode, OCF
i and OCMPi are set
while the counter value equals the OC
iR regis-
ter value plus 1 (see Figure 34 on page 48).
4. The output compare functions can be used both
for generating external events on the OCMP
i
pins even if the input capture mode is also
used.
5. The value in the 16-bit OCiR register and the
OLV
i bit should be changed after each suc-
cessful comparison in order to control an output
waveform or establish a new elapsed timeout.
Forced Compare Output capability
When the FOLV
i bit is set by software, the OLVLi
bit is copied to the OCMP
i pin. The OLVi bit has to
be toggled in order to toggle the OCMP
i pin when
it is enabled (OC
iE bit=1). The OCFi bit is then not
set by hardware, and thus no interrupt request is
generated.
FOLVL
i bits have no effect in either One-Pulse
mode or PWM mode.
Figure 32. Output Compare Block Diagram
OUTPUT COMPARE
16-bit
CIRCUIT
OC1R Register
16 BIT FREE RUNNING
COUNTER
OC1E
CC0
CC1
OC2E
OLVL1
OLVL2
OCIE
(Control Register 1) CR1
(Control Register 2) CR2
0
OCF2
OCF1
(Status Register) SR
16-bit
OCMP1
OCMP2
Latch
1
Latch
2
OC2R Register
Pin
FOLV2 FOLV1
相关PDF资料
PDF描述
ST72C254G1M6 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
ST72C254G2M3 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDSO28
ST72C254G2M7 8-BIT, FLASH, 6 MHz, MICROCONTROLLER, PDSO28
ST72C254G2M1 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
ST72C254G1B1 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
相关代理商/技术参数
参数描述
ST72C254G1M6 功能描述:8位微控制器 -MCU Flash 4K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72C254G2B1 制造商:STMicroelectronics 功能描述:8-BIT MICROCONTROLLER - Bulk
ST72C254G2B6 功能描述:8位微控制器 -MCU Flash 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72C254G2B6 制造商:STMicroelectronics 功能描述:8BIT MCU FLASH 8K 72C254 DIP32
ST72C254G2M3 功能描述:8位微控制器 -MCU ST72104G ST72215G ST72254G 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT