Rainbow Electronics T89C51CC01 User Manual
Page 124
124
T89C51CC01
Rev. D – 17-Dec-01
Table 89. ADCLK Register
ADCLK (S:F2h)
ADC Clock Prescaler
Reset Value: XXX0 0000b
Table 90. ADDH Register
ADDH (S:F5h Read Only)
ADC Data High byte register
Reset Value: 00h
Table 91. ADDL Register
ADDL (S:F4h Read Only)
ADC Data Low byte register
Reset Value: 00h
7
6
5
4
3
2
1
0
-
-
-
PRS 4
PRS 3
PRS 2
PRS 1
PRS 0
Bit
Number
Bit
Mnemonic
Description
7-5
-
Reserved
The value read from these bits are indeterminate. Do not set these bits.
4-0
PRS4:0
Clock Prescaler
f
ADC
= fcpu clock/ (4 (or 2 in X2 mode)* (PRS +1))
7
6
5
4
3
2
1
0
ADAT 9
ADAT 8
ADAT 7
ADAT 6
ADAT 5
ADAT 4
ADAT 3
ADAT 2
Bit
Number
Bit
Mnemonic
Description
7-0
ADAT9:2
ADC result
bits 9-2
7
6
5
4
3
2
1
0
-
-
-
-
-
-
ADAT 1
ADAT 0
Bit
Number
Bit
Mnemonic
Description
7-2
-
Reserved
The value read from these bits are indeterminate. Do not set these bits.
1-0
ADAT1:0
ADC result
bits 1-0