MC68HC11KW1 Datasheet, PDF (204/238 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Note if the CSEK bit in the OPTION register is set, then the internal R-C oscillator (nominally
1.5MHz) is used for the A/D conversion and the ADER bit has no effect on the frequency.
10.7.3 ADR1 — ADR8 A/D result registers
A/D result 1 (ADR1) high
A/D result 1 (ADR1) low
A/D result 2 (ADR2) high
A/D result 2 (ADR2) low
A/D result 3 (ADR3) high
A/D result 3 (ADR3) low
A/D result 4 (ADR4) high
A/D result 4 (ADR4) low
A/D result 5 (ADR5) high
A/D result 5 (ADR5) low
A/D result 6 (ADR6) high
A/D result 6 (ADR6) low
A/D result 7 (ADR7) high
A/D result 7 (ADR7) low
A/D result 8 (ADR8) high
A/D result 8 (ADR8) low
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$0040 (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$0041 (7) (6) 0
0
0
0
0
0 uu00 0000
$0042 (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$0043 (7) (6) 0
0
0
0
0
0 uu00 0000
$0044 (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$0045 (7) (6) 0
0
0
0
0
0 uu00 0000
$0046 (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$0047 (7) (6) 0
0
0
0
0
0 uu00 0000
$0048 (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$0049 (7) (6) 0
0
0
0
0
0 uu00 0000
$004A (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$004B (7) (6) 0
0
0
0
0
0 uu00 0000
$004C (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$004D (7) (6) 0
0
0
0
0
0 uu00 0000
$004E (Bit 15) (14) (13) (12) (11) (10) (9) (8) undefined
$004F (7) (6) 0
0
0
0
0
0 uu00 0000
10
The eight 10-bit result registers are read-only; they can be read at any time, but a write will have
no meaning or effect. In each result register, the eight high order bits are in one address location
and the remaining two low order bits are in bit locations 6 and 7 of the following address. The six
unused bits will always read as zeros. This allows a double byte read to be performed without
having to adjust the result.
10-8
ANALOG-TO-DIGITAL CONVERTER
MC68HC11KW1