參數(shù)資料
型號： MCR705JP7CDWE
廠商： Freescale Semiconductor
文件頁數(shù)： 142/164頁
文件大?。?/td> 0K
描述： MCU 8BIT 224B RAM 28-SOIC
標準包裝： 26
系列： HC05
核心處理器： HC05
芯體尺寸： 8-位
速度： 2.1MHz
連通性： SIO
外圍設備： POR，溫度傳感器，WDT
輸入/輸出數(shù)： 22
程序存儲器容量： 6KB（6K x 8）
程序存儲器類型： OTP
RAM 容量： 224 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉換器： A/D 4x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
包裝： 管件
Analog Status Register
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
79
ISEN
The ISEN enable bit will power down the charge current source and disable the discharge device in
the analog subsystem. Powering down the current source will drop the supply current by about 200
A. This bit is cleared by a reset of the device.
1 = Writing a logic 1 powers up the ramping current source and enables the discharge device on
the PB0/AN0 pin.
0 = Writing a logic 0 powers down the ramping current source and disables the discharge device on
the PB0/AN0 pin.
NOTE
The analog subsystem has support circuitry which draws current. This
current will be powered down if both comparators and the charge current
source are powered down (ISEN, CP1EN, and CP2EN all cleared).
Powering up either comparator or the charge current source will activate
the support circuitry.
8.4 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
654321
Bit 0
Read:
CPF2
CPF1
0
COE1
VOFF
CMP2
CMP1
Write:
CPFR2
CPFR1
R
Reset:
00000000
= Unimplemented
R
= Reserved
Figure 8-6. Analog Status Register (ASR)
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