參數(shù)資料
型號： MC68HC705S
廠商： Motorola, Inc.
英文描述： HCMOS Microcontroller Unit
中文描述： HCMOS微控制器
文件頁數(shù)： 119/242頁
文件大?。?/td> 1798K
代理商： MC68HC705S
Analog Subsystem
Analog Status Register
MC68HC705JJ7 MC68HC705JP7 — REV 4
Advance Information
MOTOROLA
Analog Subsystem
119
8.5 Analog Status Register
The analog status register (ASR) contains status and control of the
comparator flag bits. These bits in the ASR are shown in
Figure 8-6
. All
the bits in this register are cleared by a reset of the device.
CPF2
This read-only flag bit is edge sensitive to the rising output of
comparator 2. It is set when the voltage on the PB0/AN0 pin rises
above the voltage on a sample capacitor which creates a positive
edge on the output of comparator 2, regardless of the state of the INV
bit in the AMUX register. This bit is reset by writing a logic 1 to the
CPFR2 reset bit in the ASR. This bit is cleared by a reset of the
device.
1 = A positive transition on the output of comparator 2 has occurred
since the last time the CPF2 flag has been cleared.
0 = A positive transition on the output of comparator 2 has
not
occurred since the last time the CPF2 flag has been cleared.
CPF1
This read-only flag bit is edge sensitive to the rising output of
comparator 1. It is set when the voltage on the PB2/AN2 pin rises
above the voltage on the PN3/AN3/TCAP pin which creates a positive
edge on the output of comparator 1, regardless of the state of the INV
bit in the AMUX register. This bit is reset by writing a logic 1 to the
CPFR1 reset bit in the ASR. This bit is cleared by a reset of the
device.
1 = A positive transition on the output of comparator 1 has occurred
since the last time the CPF1 flag has been cleared.
0 = A positive transition on the output of comparator 1 has
not
occurred since the last time the CPF1 flag has been cleared.
Address:
$001E
Bit 7
6
5
4
3
2
1
Bit 0
Read:
CPF2
CPF1
0
0
COE1
VOFF
CMP2
CMP1
Write:
CPFR2
CPFR1
R
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
R
= Reserved
Figure 8-6. Analog Status Register (ASR)
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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