EM78P312N
8-Bit Microcontroller
Bit 4 ~ Bit 2 ( TC4CK2 ~ TC4CK 0 ) : Timer/Counter 4 Clock Source Select
Clock Source
( Normal, Idle )
Resolution
( Fosc=8M )
Max. Time
TC4CK2 TC4CK1 TC4CK0
( Fosc=8M )
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Fc/211
Fc/27
Fc/25
Fc/23
Fc/22
Fc/21
256μS
16μS
4μS
65mS
4mS
1mS
1μS
255μS
127.5μS
63.8μS
31.9μS
−
500nS
250nS
125nS
−
Fc
External clock (TC4 pin)
Bit 1 ~ Bit 0 ( TC4M1 ~ TC4M0 ) : Timer/Counter 4 Operating Mode Select
TC4M1
TC4M0
Operating Mode
Timer/Counter
0
0
1
1
0
1
0
1
Reserved
Programmable Divider output
Pulse Width Modulation output
RC (Timer 4 Data Buffer)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TC4D7
TC4D6
TC4D5
TC4D4
TC4D3
TC4D2
TC4D1
TC4D0
Bit 7 ~ Bit 0 ( TC4D7 ~ TC4D0 ) : Data buffer of 8-bit Timer/Counter 4.
RD (Interrupt Status Flag Register 0 and INT3 Edge Detect Flag)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
INT3F
INT3R
0
0
WDTIF
EXIF0
Bit 5 ( INT3F ) : External Interrupt 3 falling edge detect flag.
INT3F = “0” : Falling edge is not detected
INT3F = “1” : Falling edge is detected
Bit 4 ( INT3R ) : External Interrupt 3 rising edge detect flag.
INT3R = “0” : Rising edge is not detected
INT3R = “1” : Rising edge is detected
Bit 1 ( WDTIF ) : WDT time-out flag, flag cleared by software.
Bit 0 ( EXIF0 ) : External interrupt flag (INT0). Flag cleared by software. If the INT0EN
is reset to “0”, the flag is cleared.
Product Specification (V1.0) 10.03.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
