参数资料
型号: EVAL-ADUC841QSZ
厂商: Analog Devices Inc
文件页数: 30/88页
文件大小: 0K
描述: KIT DEV FOR ADUC841 QUICK START
产品培训模块: Process Control
标准包装: 1
系列: QuickStart™ 套件
类型: MCU
适用于相关产品: ADuC841
所含物品: 评估板、电源、缆线、软件和说明文档
产品目录页面: 739 (CN2011-ZH PDF)
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ADUC841BCPZ8-3-ND - IC MCU 8KB FLASH ADC/DAC 56LFCSP
ADUC841BCPZ8-5-ND - IC MCU 8KB FLASH ADC/DAC 56LFCSP
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其它名称: EVAL-ADUC841QS
EVAL-ADUC841QS-ND
ADuC841/ADuC842/ADuC843
Rev. 0 | Page 36 of 88
ADuC842/ADuC843 Configuration SFR (CFG842)
The CFG842 SFR contains the necessary bits to configure the
internal XRAM, external clock select, PWM output selection,
DAC buffer, and the extended SP for both the ADuC842 and the
ADuC843. By default, it configures the user into 8051 mode, i.e.,
extended SP is disabled and internal XRAM is disabled. On the
ADuC841, this register is the CFG841 register and is described
on the next page.
CFG842
ADuC842/ADuC843 Config SFR
SFR Address
AFH
Power-On Default
00H
Bit Addressable
No
Table 13. CFG842 SFR Bit Designations
Bit No.
Name
Description
7
EXSP
Extended SP Enable.
When set to 1 by the user, the stack rolls over from SPH/SP = 00FFH to 0100H.
When set to 0 by the user, the stack rolls over from SP = FFH to SP = 00H.
6
PWPO
PWM Pin Out Selection.
Set to 1 by the user to select P3.4 and P3.3 as the PWM output pins.
Set to 0 by the user to select P2.6 and P2.7 as the PWM output pins.
5
DBUF
DAC Output Buffer.
Set to 1 by the user to bypass the DAC output buffer.
Set to 0 by the user to enable the DAC output buffer.
4
EXTCLK
Set by the user to 1 to select an external clock input on P3.4.
Set by the user to 0 to use the internal PLL clock.
3
RSVD
Reserved. This bit should always contain 0.
2
RSVD
Reserved. This bit should always contain 0.
1
MSPI
Set to 1 by the user to move the SPI functionality of MISO, MOSI, and SCLOCK to P3.3, P3.4, and P3.5,
respectively.
Set to 0 by the user to leave the SPI functionality as usual on MISO, MOSI, and SCLOCK pins.
0
XRAMEN
XRAM Enable Bit.
When set to 1 by the user, the internal XRAM is mapped into the lower 2 kBytes of the external address
space.
When set to 0 by the user, the internal XRAM is not accessible, and the external data memory is
mapped into the lower 2 kBytes of external data memory.
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