MC68HC11EA9 Datasheet, PDF (56/58 Pages) Motorola, Inc – 8 BIT HCMOS SINGLE CHIP MICROCONTOROLLER WITH A/D CONVERTER

Freescale Semiconductor, Inc.
ADCTL — A/D Control/Status
$1030
BIT 7
6
5
4
3
2
1
BIT 0
CCF
—
SCAN MULT
CD
CC
CB
CA
RESET:
I
0
I
I
I
I
I
I
CCF — Conversions Complete Flag
Set after an A/D conversion cycle is completed. CCF is cleared by a write to ADCTL.
0 = The A/D converter is currently performing a conversion sequence
1 = The A/D converter has completed a conversion, placed the result in the appropriate result reg-
ister and is currently idle
Bit 6 — Not implemented
Always reads zero
SCAN — Continuous Scan Control
0 = Do four conversions and stop
1 = Convert four channels in selected group continuously
MULT — Multiple Channel/Single Channel Control
0 = Convert single channel selected
1 = Convert four channels in selected group
CD–CA — Channel Select D through A
Table 23 A/D Converter Channel Select Control Bits
Channel Select Control Bits
CD CC CB CA
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Channel
Signal
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Reserved
Reserved
Reserved
Reserved
V_RH*
V_RL*
(V_RH)/2*
Reserved
Result in ADRx if
MULT = 1
ADR1
ADR2
ADR3
ADR4
ADR1
ADR2
ADR3
ADR4
—
—
—
—
ADR1
ADR2
ADR3
ADR4
MC68HC11EA9
56
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MC68HC11EA9TS/D
Go to: www.freescale.com