參數(shù)資料
型號(hào)： EM78458
英文描述： Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述： 8位微控制器的通用產(chǎn)品
文件頁數(shù)： 32/57頁
文件大小： 854K
代理商： EM78458
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
38
4.9 Timer
1. Overview
Timer1 (TMR1) and Timer2 (TMR2) (TMRX) are 10-bit clock counters with programmable prescalers,
respectively. They are designed for the PWM module as baud rate clock generators. TMRX can be
read, written, and cleared at any reset conditions.
2. Function description
Fig. 15 shows TMRX block diagram. Each signal and block are described as follows:
Data Bus
PRD1
Comparator
TMR1X
MUX
Period
Match
T1P0
T1P1 T1EN
PRD2
Comparator
TMR2X
MUX
Period
Match
T2P0 T2P1 T2EN
To PWM1IF
To PWM2IF
reset
1:2
1:8
1:32
Fosc
1:64
1:2
1:8
1:32
Fosc
1:64
*TMR1X = TMR1H + TMR1L;
*TMR2X = TMR2H +TMR2L
Fig. 15 TMRX Block Diagram
Fosc: Input clock.
Prescaler ( T1P0 and T1P1/T2P1 and T2P0 ): Options of 1:2, 1:8, 1:32, and 1:64 are defined by
TMRX. It is cleared when any type of reset occurs.
TMR1X and TMR2X (TMR1H/TWR1L and TMR2H/TMR2L ):
Timer
X
register;
TMRX
is
increased until it matches with PRDX, and then is reset to 0. TMRX cannot be read.
PRDX ( PRD1 and PRD2 ): PWM period register.
相關(guān)PDF資料
PDF描述
EM78459 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
EM78450 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
EM78612 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 16-QFN
EM78P451 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features; Temperature Range: 0&degC to 70°C; Package: 16-QFN
EM83050 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features; Temperature Range: -40°C to 85°C; Package: 16-QFN T&R
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EM78458AM 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78458AP 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459AK 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459AM 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
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