参数资料
型号: ADUC814BRUZ
厂商: Analog Devices Inc
文件页数: 38/72页
文件大小: 0K
描述: IC ADC 12BIT W/FLASH MCU 28TSSOP
标准包装: 50
系列: MicroConverter® ADuC8xx
核心处理器: 8052
芯体尺寸: 8-位
速度: 16.78MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PSM,温度传感器,WDT
输入/输出数: 17
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
EEPROM 大小: 640 x 8
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
数据转换器: A/D 6x12b; D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
包装: 管件
产品目录页面: 738 (CN2011-ZH PDF)
配用: EVAL-ADUC814QSZ-ND - KIT DEV FOR ADUC814 MICROCONVRTR
ADuC814
Rev. A | Page 43 of 72
ADuC814 CONFIGURATION REGISTER (CFG814)
The ADuC814 is housed in a 28-lead TSSOP package. To
maintain as much functional compatibility with other
MicroConverter products, some pins share multiple I/O
functionality. Switching between these functions is controlled
via the ADuC814 configuration SFR, CFG814, located at SFR
address 9CH. A summary of these functions is described and a
detailed bit designation for the CFG814 SFR is given in Table 17.
Serial Peripheral Interface
The SPI interface on the ADuC814 shares the same pins as
digital outputs P3.5, P3.6, and P3.7. The SPE bit in SPICON is
used to select which interface is active at any one time. This is
described in greater detail in the next section. By default, these
pins operate as standard Port 3 pins. Bit 0 of the CFG814 SFR
must be set to 1 to enable the SPI interface on these Port 3 pins.
External Clock
The ADuC814 is intended for use with a 32.768 kHz watch
crystal. The on-chip PLL locks onto a multiple of this to provide
a stable 16.777216 MHz clock for the device. On the ADuC814,
P3.5 alternate functions include T1 input and slave select in SPI
master mode. P3.5 also functions as external clock input, EXTCLK,
selected via Bit 1 of the CFG814 SFR. When selected, this
external clock bypasses the PLL and is used as the clock for the
device, therefore allowing the ADuC814 to be synchronized to
the rest of the application system. The maximum input frequency
of this external clock is 16.777216 MHz. If selected, the EXTCLK
signal affects the timing of the majority of peripherals on the
ADuC814 including the ADC, EEPROM controller, watchdog
timer, SPI interface clock, and the MicroConverter core clock.
CFG814
ADuC814 Configuration Register
SFR Address
9CH
Power-On Default
04H
Bit Addressable
No
EXTCLK
SER_EN
Table 17. CFG814 SFR Bit Designations
Bit No.
Name
Description
1
EXTCLK
External Clock Selection Bit.
Set to 1 to enable EXTCLK as MCU core clock.
Cleared to 0 to enable XTAL and PLL as the MCU core clock.
0
SER_EN
Serial Interface Enable Bit.
Set to 1 by the user to enable the SPI interface onto the P3.5, P3.6, and P3.7 pins.
Cleared to 0 by the user to enable standard Port 3 functionality on the P3.5, P3.6, and P3.7 pins.
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