參數(shù)資料
型號: MC68HC705P6AMDWER2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: LEAD FREE, SOIC-28
文件頁數(shù): 110/130頁
文件大小: 1541K
代理商: MC68HC705P6AMDWER2
Analog Subsystem
Advance Information
MC68HC705P6A — Rev. 2.0
80
Analog Subsystem
MOTOROLA
9.5.3 Multi-Channel Operation
An input multiplexer allows the A/D converter to select from one of four
external analog signals. Port C pins PC3 through PC6 are shared with
the inputs to the multiplexer.
9.6 A/D Status and Control Register (ADSC)
The ADSC register reports the completion of A/D conversion and
provides control over oscillator selection, analog subsystem power, and
input channel selection. See Figure 9-1.
CC — Conversion Complete
This read-only status bit is set when a conversion sequence has
completed and data is ready to be read from the ADC register. CC is
cleared when the ADSC is written to or when data is read from the
ADC register. Once a conversion has been started, conversions of
the selected channel will continue every 32 internal clock cycles until
the ADSC register is written to again. During continuous conversion
operation, the ADC register will be updated with new data, and the CC
bit set every 32 internal clock cycles. Also, data from the previous
conversion will be overwritten regardless of the state of the CC bit.
ADRC — RC Oscillator Control
When ADRC is set, the A/D subsystem operates from the internal RC
oscillator instead of the internal clock. The RC oscillator requires a
time, tRCON, to stabilize before accurate conversion results can be
Address: $001E
Bit 7
6
54321
Bit 0
Read:
CC
ADRC
ADON
00
CH2
CH1
CH0
Write:
Reset:
00
000000
= Unimplemented
Figure 9-1. A/D Status and Control Register (ADSC)
相關(guān)PDF資料
PDF描述
MC68HC705P6ASD 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER
MC68HC705P6AMDWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705P6ASD 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER
MC68HC705P6ACSD 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER
MCHC705P6ACSDR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER
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