参数资料
型号: EM78459
英文描述: Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
中文描述: 8位微控制器的通用产品
文件页数: 30/57页
文件大小: 854K
代理商: EM78459
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
36
Data Bus
PRD1
Comparator
TMR1H + TMR1L
S
R
Q
MUX
Duty Cycle
Match
Period
Match
PWM1
T1P0 T1P1 T1EN
IOC6
PRD2
Comparator
S
R
Q
MUX
Duty Cycle
Match
Period
Match
PWM2
T2P0 T2P1 T2EN
IOC6
To PWM1IF
To PWM2IF
reset
latch
1:2
1:8
1:32
Fosc
1:64
1:2
1:8
1:32
Fosc
1:64
TMR2H + TMR2L
DT2H
+
DT2L
DT2H
+
DT2L
DL2H + DL2L
Fig. 13 The Functional Block Diagram of the Dual PWMs
Period
Duty Cycle
DT1 = TMR1
PRD1 = TMR1
Fig. 14 The Output Timing of the PWM
2. Increment Timer Counter ( TMRX: TMR1H/TWR1L or TMR2H/TWR2L )
TMRX are ten-bit clock counters with programmable prescalers. They are designed for the PWM
module as baud rate clock generators. TMRX can be read, written, and cleared at any reset
conditions. If employed, they can be turned down for power saving by setting T1EN bit
[PWMCON<4>] or T2EN bit [PWMCON<5>] to 0.
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