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EM78P312N
8-Bit Microcontroller
Product Specification (V1.0) 10.03.2006
• 13
(This specification is subject to change without further notice)
Bit 6 ( ADRUN ) : AD Conversion start
ADRUN = “0” : Reset on completion of the conversion by hardware, this bit
cannot be reset by software.
ADRUN = “1” : Conversion starts
Bit 5~ Bit 4 ( ADCK1 ~ ADCK0 ) : AD Conversion Time Select
ADCK1 ADCK0
Clock Source
( Normal, Idle )
Max. Operating
Frequency (Fc)
0 0 Fc/4 1MHz
0 1 Fc/16 4MHz
1 0 Fc/32 8MHz
1 1 Reserved -
Bit 3 ( ADP ) : AD power control
ADP = “0” : Power on
ADP = “1” : Power down
Bit 2 ~ Bit 0 ( ADIS2 ~ ADIS0 ) : Analog Input Pin Select
ADIS2 ADIS1 ADIS0 Analog Input Pin
0 0 0 AD0
0 0 1 AD1
0 1 0 AD2
0 1 1 AD3
1 0 0 AD4
1 0 1 AD5
1 1 0 AD6
1 1 1 AD7
Bank 1 RC ADIC (AD Input Pin Control)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ADE7 ADE6 ADE5 ADE4 ADE3 ADE2 ADE1 ADE0
Bit 7 ~ Bit 0 ( ADE7 ~ ADE0 ) : AD input pin enable control.
ADEx = “0” : Port 9.x functions as I/O pin
ADEx = “1” : Port 9.x functions as analog input pin
Bank 1 RD ADDH (AD High 8-bit Data Buffer)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ADD9 ADD8 ADD7 ADD6 ADD5 ADD4 ADD3 ADD2
Bit 7 ~ Bit 0 ( ADD9 ~ ADD2 ) : AD high 8-bit data buffer