EM78M612
Universal Serial Bus Microcontroller Series
ꢀ 10-bit resolution: 0x00-00~0xC0-FF (0b11000000-11111111)
ꢀ Start (0x00-00): 0 Vref~(1/1024)*Vref
ꢀ Full (0xC0-FF): (1023/1024)*Vref~Vref
ꢀ Conversion Rate: 2.5K; 5K; 10K; & 20K
8.10.2 Control Register
RAS (AD Channel Select Register) Default Value: (0B_0000_0000)
7
6
5
0
4
3
2
1
0
Token
Bit
ADC
AD4
AD3
AD2
AD1
AD0
RAS [0~4]:AD Channel Selector
AD4
AD3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
AD2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
AD1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
AD0
Channel
Disable AD
I/O Port
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
-
Reserved
P61
P62
P63
P64
P65
P66
P67
P70
P71
P72
P73
P74
P75
P76
P77
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0
0
0
RAS [6] Token Bit. This bit is asserted when MCU receives or transmits USB transaction.
RAS [7] AD Converter ready flag.
0 ꢂ1: Start AD Conversion (Set by firmware).
1 ꢂ0: When AD finishes converting and has moved digital data into AD Data Register,
this bit will be Cleared by hardware.
[NOTE] Hardware can enable this function only at AD Channel Selector of the functional I/O
port. After Power-on reset, the initial value of this register is 0b0000 0000.
This specification may change without further notice.
2004/4/28 V1.1
34
ELAN [ ELAN MICROELECTRONICS CORP ]
