參數(shù)資料
型號(hào)： IS89C52-40PQI
廠商： INTEGRATED SILICON SOLUTION INC
元件分類： 微控制器/微處理器
英文描述： CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
中文描述： 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44
封裝： PLASTIC, QFP-44
文件頁(yè)數(shù)： 17/50頁(yè)
文件大?。?/td> 425K
代理商： IS89C52-40PQI
IS89C52
Integrated Silicon Solution, Inc. — 1-800-379-4774
MC013-1C
11/21/98
17
ISSI
Figure 11. Timer/Counter 0 Mode 3: Two 8-Bit Counters
DIVIDE 12
1/12 FOSC
1/12 FOSC
OSC
TL0
(8 BITS)
TF0
TF1
CONTROL
CONTROL
C/T = 0
C/T = 1
GATE
TR1
INT0 PIN
TR0
T0 PIN
INTERRUPT
TH0
(8 BITS)
INTERRUPT
1/12 FOSC
Timer 2
This is a powerful addition to the other two just discussed.
Five extra special function registers are added to
accommodate Timer 2 which are: the timer registers, TL2
and TH2, the timer control register, T2CON, and the
capture registers, RCAP2L and RCAP2H. Like Timers 0
and 1, it can operate either as a timer or as an event
counter, depending on the value of bit C/
T2
in the Special
Function Register T2CON. Timer 2 has three operating
modes: capture, auto-reload, and baud rate generator,
which are selected by RCLK, TCLK, CP/
RL2
, and TR2.
In the Capture Mode, the EXEN2 bit in T2CON selects two
options. If EXEN2 = 0, then Timer 2 is a 16-bit timer or
counter whose overflow sets bit TF2, the Timer 2 overflow
bit, which can be used to generate an interrupt. If EXEN2
= 1, then Timer 2 performs the same way, but a 1-to-0
transition at external input T2EX also causes the current
value in the Timer 2 registers, TL2 and TH2, to be captured
into the RCAP2L and RCAP2H registers, respectively. In
addition, the transition at T2EX sets the EXF2 bit in
T2CON, and EXF2, like TF2, can generate an interrupt.
The Capture Mode is illustrated in Figure 12.
In the auto-reload mode, the EXEN2 bit in T2CON also
selects two options. If EXEN2 = 0, then when Timer 2 rolls
over it sets TF2 and also reloads the Timer 2 registers with
the 16-bit value in the RCAP2L and RCAP2H registers,
which are preset by software. If EXEN2 = 1, then Timer 2
performs the same way, but a 1-to-0 transition at external
input T2EX also triggers the 16-bit reload and sets EXF2.
The auto-reload mode is illustrated in Figure 13.
The baud rate generator mode is selected by RCLK = 1
and/or TCLK = 1. This mode is described in conjunction
with the serial port (see Figure 14).
相關(guān)PDF資料
PDF描述
IS89C52-40W CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
IS89C52-40WI CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
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IS89C52-12PLI ECONOLINE: RY-S_DCP - Internal SMD Technology- 1kVDC Isolation- Short Circuit Protection: Current Limit- UL94V-0 Package Material- Regulated Output- No External Components Required- Efficiency to 63%
IS89C52-12PQ RY Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 24V; Output Voltage (Vdc): 05V; Power: 1W; On/Off Pin; 1kVDC Isolation; UL94V-0 Package Material; Optional Continuous Short Circuit Protected; Internal linear regulator; Efficiency to 70%
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IS89C52-40W 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
IS89C52-40WI 制造商:ISSI 制造商全稱:Integrated Silicon Solution, Inc 功能描述:CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
IS89D 制造商:IDEC CORPORATION 功能描述:SENS.IND. 2W/F 24-23VAC NO
IS89DK 制造商:IDEC CORPORATION 功能描述:SENS.IND. 2W/F 24-230VAC NO
IS89DL 制造商:IDEC CORPORATION 功能描述:SENS.IND. 2W/F 24-230VAC NO
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