MC145173 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC145173 Datasheet PDF : 33 Pages
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A REGISTER BITS
EOC
End of Conversion (A7)
The end of conversion bit is set high when the analog–to–
digital conversion is complete. This high level indicates that
the A/D conversion value read via the serial port is valid.
EOC is cleared low when the I SMPL bit in the C register is
cleared low.
IN C
Input C Level (A6)
In C indicates the state of the Input C pin. A high level on
the Input C pin causes the In C bit to be high. A low level on
the pin causes a low level to be read on In C. The digital val-
ue is stored at the falling edge of ENB on the read cycle.
ADC CONVERSION VALUE
A/D Conversion Value (A5 – A0)
These bits contain the analog–to–digital conversion result
in binary format. A5 is the MSB of the value; A0 is the LSB.
IN D
Input D Level (A#)
In D indicates the state of the Input D pin. A high level on
the Input D pin causes the In D bit to be high. A low level on
the pin causes a low level to be read on In D. The digital val-
ue is stored at the falling edge of ENB on the read cycle.
A 9– or 16–bit shift must be used to read the In D bit from
the A register. Optionally, the In D bit may be read from the F
register.
ENB
CLK
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
MSB
Dout
A7 A6 A5 A4 A3 A2 A1 A0 A# x
x
x
x
x
x
x
IN C
ADC
IN D
EOC
CONVERSION
VALUE
ENB
DON’T CARE
CLK
1
2
3
4
5
6
7
8
9
MSB
Dout
A7 A6 A5 A4 A3 A2 A1 A0 A#
IN C
ADC
IN D
EOC
CONVERSION
VALUE
ENB
CLK
1
2
3
4
5
6
7
8
MSB
Dout
A7
A6
A5
A4
A3
A2
A1
A0
IN C
EOC
NOTE: This is a read–only register.
ADC
CONVERSION
VALUE
Figure 21. A Register Formats (8, 9, or 16 Clock Cycles May Be Used)
MOTOROLA
MC145173
17
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