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EM78P312N
8-Bit Microcontroller
12 •
Product Specification (V1.0) 10.03.2006
(This specification is subject to change without further notice)
Bank 1 R8 TC2CR/ ADDL (Timer/Counter 2 Control Register, AD Low 2 bits
Data Buffer)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ADD1 ADD0 0 TC2M TC2S TC2CK2 TC2CK1 TC2CK0
Bit 7 ~ Bit 6 ( ADD1 ~ ADD0 ) : AD low 2-bit data buffer
Bit 4 ( TC2M ) : Timer/Counter 2 mode select
TC2M = “0” : Timer/counter mode
TC2M = “1” : Window mode
Bit 3 ( TC2S ) : Timer/Counter 2 start control
TC2S = “0” : Stop and counter clear
TC2S = “1” : Start
Bit 2 ~ Bit 0 ( TC2CK2 ~ TC2CK0 ) : Timer/Counter 2 Clock Source Select
TC2CK2 TC2CK1 TC2CK0
Clock Source
( Normal, Idle )
Resolution
( Fc=8M )
Max. Time
( Fc=8M )
0 0 0 Fc/2
23
1.05s 19.1h
0 0 1 Fc/2
13
1.02ms 1.1min
0 1 0 Fc/2
8
32μs 2.1s
0 1 1 Fc/2
3
1μs 65.5ms
1 0 0 Fc 125ns 7.9ms
1 0 1 - - -
1 1 0 - - -
1 1 1 External clock (TC2 pin)
Bank 1 R9 TC2DH (Timer 2 Data Buffer High Byte)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TC2D15 TC2D14 TC2D13 TC2D12 TC2D11 TC2D10 TC2D9 TC2D8
Bit 7 ~ Bit 0 ( TC2D15 ~ TC2D8 ) : 16-bit Timer/Counter 2 data buffer high byte.
Bank 1 RA TC2DL (Timer 2 Data Buffer Low Byte)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
TC2D7 TC2D6 TC2D5 TC2D4 TC2D3 TC2D2 TC2D1 TC2D0
Bit 7 ~ Bit 0 ( TC2D7 ~ TC2D0 ) : 16-bit Timer/Counter 2 data buffer low byte.
Bank 1 RB ADCR (AD Control Register)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ADREF ADRUN ADCK1 ADCK0 ADP ADIS2 ADIS1 ADIS0
Bit 7 ( ADREF ) : AD reference voltage input select.
ADREF = “0” : Internal VDD, P97 is used as IO.
ADREF = “1” : External reference pin, P97 is used as reference input pin.