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EM78P451SWM Datasheet(PDF) 18 Page - ELAN Microelectronics Corp

No. de pieza EM78P451SWM
Descripción Electrónicos  8-Bit Microcontroller with OTP ROM
PDF  54 Pages
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Fabricante Electrónico  EMC [ELAN Microelectronics Corp]
Página de inicio  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P451SWM Datasheet(HTML) 18 Page - ELAN Microelectronics Corp

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EM78P451S
8-Bit Microcontroller with OTP ROM
14
•
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
Bit 1 (EXIE) EXIF interrupt enable bit.
0: disable EXIF interrupt
1: enable EXIF interrupt
Bit 0 (TCIE) TCIF interrupt enable bit.
0: disable TCIF interrupt
1: enable TCIF interrupt
O scillator
Ena b le
D isab le
Re se t
Q
D
Q
CL K
P
R
C
L
Cle ar
fro m S /W
Set
4
/W U E
/W U E
/W U E
V CC
P60 ~P67
VC C
/W U E
P7 4~P7 5, P90 ~P91
/P HE N
8
Fig. 5 Block Diagram of Sleep Mode and Wake-up Circuits on I/O Ports
4.3 TCC/WDT Presacler
An 8-bit counter is available as prescaler for the TCC or WDT. The prescaler is
available for either the TCC or WDT only at any given time, and the PAB bit of CONT
register is used to determine the prescaler assignment. The PSR0~PSR2 bits
determine the prescale ratio. The prescaler is cleared each time the instruction is
written to TCC under TCC mode. The WDT and prescaler, when assigned to WDT
mode, are cleared by the WDTC or SLEP instructions. Fig. 6 depicts the circuit
diagram of TCC/WDT.
R1(TCC) is an 8-bit timer/counter. TCC will increase by one at every instruction
cycle (without prescaler).



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