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| 型号： | ST10F269Z2Q3 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144 |
| 封装： | 28 X 28 MM, PLASTIC, QFP-144 |
| 文件页数： | 108/160页 |
| 文件大小： | 1541K |
| 代理商： | ST10F269Z2Q3 |
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ST10F269
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10 - GENERAL PURPOSE TIMER UNIT
The GPT unit is a flexible multifunctional timer/
counter structure which is used for time related
tasks such as event timing and counting, pulse
width
and
duty cycle
measurements, pulse
generation, or pulse multiplication. The GPT unit
contains five 16-bit timers organized into two
separate modules GPT1 and GPT2. Each timer in
each module may operate independently in
several different modes, or may be concatenated
with another timer of the same module.
10.1 - GPT1
Each of the three timers T2, T3, T4 of the GPT1
module can be configured individually for one of
four basic modes of operation: timer, gated
timer, counter mode and incremental interface
mode.
In timer mode, the input clock for a timer is derived
from the CPU clock, divided by a programmable
prescaler.
In counter mode, the timer is clocked in reference
to external events.
Pulse width or duty cycle measurement is
supported
in gated timer mode where
the
operation of a timer is controlled by the ‘gate’ level
on an external input pin. For these purposes, each
timer has one associated port pin (TxIN) which
serves as gate or clock input.
Table
11
lists
the
timer
input
frequencies,
resolution and periods for each pre-scaler option
at 40MHz CPU clock. This also applies to the
Gated Timer Mode of T3 and to the auxiliary
timers T2 and T4 in Timer and Gated Timer Mode.
The count direction (up/down) for each timer is
programmable by software or may be altered
dynamically by an external signal on a port pin
(TxEUD).
In Incremental Interface Mode, the GPT1 timers
(T2, T3, T4) can be directly connected to the
incremental position sensor signals A and B by
their respective inputs TxIN and TxEUD.
Direction and count signals are internally derived
from these two input signals so that the contents
of the respective timer Tx corresponds to the
sensor position. The third position sensor signal
TOP0 can be connected to an interrupt input.
Timer T3 has output toggle latches (TxOTL) which
changes state on each timer over flow / underflow.
The state of this latch may be output on port pins
(TxOUT) for time out monitoring of external
hardware components, or may be used internally
to clock timers T2 and T4 for high resolution of
long duration measurements.
In addition to their basic operating modes, timers
T2 and T4 may be configured as reload or capture
registers for timer T3. When used as capture or
reload registers, timers T2 and T4 are stopped.
The contents of timer T3 is captured into T2 or T4
in response to a signal at their associated input
pins (TxIN).
Timer T3 is reloaded with the contents of T2 or T4
triggered either by an external signal or by a
selectable state transition of its toggle latch
T3OTL. When both T2 and T4 are configured to
alternately reload T3 on opposite state transitions
of T3OTL with the low and high times of a PWM
signal, this signal can be constantly generated
without software intervention.
Table 11 : GPT1 Timer Input Frequencies, Resolution and Periods
fCPU = 40MHz
Timer Input Selection T2I / T3I / T4I
000b
001b
010b
011b
100b
101b
110b
111b
Pre-scaler factor
8
16
32
64
128
256
512
1024
Input Freq
5MHz
2.5MHz
1.25MHz
625kHz
312.5kHz
156.25kHz
78.125kHz
39.1kHz
Resolution
200ns
400ns
0.8s
1.6s
3.2s
6.4s
12.8s
25.6s
Period maximum
13.1ms
26.2ms
52.4ms
104.8ms
209.7ms
419.4ms
838.9ms
1.678s
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST10F269Z2Q6 | 功能描述:16位微控制器 - MCU 256K Flash 12K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| ST10F269Z2Q6/TR | 功能描述:16位微控制器 - MCU 16B MCU 256K Byte and 12K Byte RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| ST10F269Z2QX | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:16-BIT MCU WITH MAC UNIT, 256K BYTE FLASH MEMORY AND 12K BYTE RAM |
| ST10F269Z2T3 | 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| ST10F269Z2T6 | 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
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