參數(shù)資料
型號： MC68HC916X1
廠商： Motorola, Inc.
英文描述： 16-Bit Modular Microcontroller(16位模塊化微控制器)
中文描述： 16位微控制器模塊（16位模塊化微控制器）
文件頁數(shù)： 81/172頁
文件大?。?/td> 1035K
代理商： MC68HC916X1
MC68HC916X1
MC68HC916X1TS/D
MOTOROLA
81
5.5 ADC Registers
The following section provides a summary of ADC registers and their contents.
The ADCMCR is used to initialize the ADC.
STOP — STOP Mode
0 = Normal operation
1 = Low-power operation
STOP places the ADC in low-power state by disabling the ADC clock and powering down the analog
circuitry. Setting STOP aborts any conversion in progress. STOP is set to logic level one at reset, and
may be cleared to logic level zero by the CPU.
Clearing STOP enables normal ADC operation. However, because analog circuitry bias current has
been turned off, there is a period of recovery before output stabilization.
FRZ[1:0] — FREEZE Assertion Response
The FRZ field is used to determine ADC response to assertion of the IMB FREEZE signal.
Table 39
shows possible responses.
SUPV — Supervisor/Unrestricted Data Space
This bit has no effect because the CPU16 always operates in the supervisor mode.
ADTEST
— ADC Test Register
ADTEST is used during factory test of the ADC.
$YFF702
Port ADA is an input port that shares pins with the A/D converter inputs.
PADA[7:6] — Port ADA Data Pins
PADA[7:6] digital inputs to the ADC module are internally connected to V
SSA
. The corresponding bits
in PORTADA will read zero at all times.
ADCMCR
— ADC Module Configuration Register
$YFF700
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
STOP
FRZ[1:0]
NOT USED
SUPV
NOT USED
RESET:
1
0
0
0
Table 39 FREEZE Assertion Response
FRZ[1:0]
00
01
10
11
Response
Ignore FREEZE
Reserved
Finish conversion, then freeze
Freeze immediately
PORTADA
— Port ADA Data Register
$YFF706
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
NOT USED
PADA7
PADA6
PADA5
PADA4
PADA3
PADA2
PADA1
PADA0
RESET:
0
0
REFLECTS STATE OF THE INPUT PINS
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