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參數(shù)資料
| 型號(hào)： | EM785842P |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-BIT MICRO-CONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 33/45頁 |
| 文件大小： | 461K |
| 代理商： | EM785842P |
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EM785840/5841/5842
8-bit Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
2004/11/10 V1.2
Data Bus
Data Bus
PRD1
Comparator
TMR1X
MUX
Period
Match
T1P0
T1P1T1EN
PRD2
Comparator
TMR2X
MUX
Period
Match
T2P0 T2P1 T2EN
To PWM1IF
To PWM2IF
reset
reset
1:2
1:8
1:32
1:64
Fosc
1:2
1:8
1:32
1:64
Fosc
*TMR1X = TMR1H + TMR1L;
*TMR2X = TMR2H +TMR2L
Fig.12 TMRX Block Diagram
Fosc: Input clock.
Prescaler (T1P0 and T1P1): 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 (TMR1H/TWR1L):Timer X register; TMRX is increased until it matches with PRDX, and then is
reset to 0. TMRX cannot be read.
PRDX (PRD1): PWM period register.
When defining TMRX, refer to the related registers of its operation as shown in prescale register. It must be
noted that the PWMX bits must be disabled if their related TMRXs are employed. That is, bit 6 of the
PWMCON register must be set to ‘0’.
Related Control Registers(R5 PAGE3) of TMR1 and TMR2
Bit 7
Bit 6
Bit 5
PWM2E
PWM1E
T2EN
Bit 4
T1EN
Bit 3
T2P1
Bit 2
T2P0
Bit 1
T1P1
Bit 0
T1P0
Timer programming procedures/steps
Load PRDX with the TIMER period.
Enable interrupt function by writing IOCF PAGE0, if required
Load a desired value to PWMCON with the TMRX prescaler value and enable both TMRX and disable
PWMX.
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