參數(shù)資料
型號(hào)： MC68HC11EA9MFN2
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC52
封裝： PLASTIC, LCC-52
文件頁(yè)數(shù)： 52/58頁(yè)
文件大?。?/td> 583K
代理商： MC68HC11EA9MFN2
MOTOROLA
MC68HC11EA9
56
MC68HC11EA9TS/D
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
ADCTL — A/D Control/Status
$1030
BIT 7
654321
BIT 0
CCF
—
SCAN
MULT
CD
CC
CB
CA
RESET:
I
0
IIIIII
Table 23 A/D Converter Channel Select Control Bits
Channel Select Control Bits
Channel
Result in ADRx if
CD
CC
CB
CA
Signal
MULT = 1
0000
AN0
ADR1
0001
AN1
ADR2
0010
AN2
ADR3
0011
AN3
ADR4
0100
AN4
ADR1
0101
AN5
ADR2
0110
AN6
ADR3
0111
AN7
ADR4
1000
Reserved
—
1001
Reserved
—
1010
Reserved
—
1011
Reserved
—
1100
VRH*
ADR1
1101
VRL*
ADR2
1110
(VRH)/2*
ADR3
1111
Reserved
ADR4
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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