参数资料
型号: ADUC7121BBCZ
厂商: Analog Devices Inc
文件页数: 42/96页
文件大小: 0K
描述: IC ARM7TDMI MCU 126KB 108CSPBGA
标准包装: 1
系列: MicroConverter® ADuC7xxx
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 41.78MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 126KB(63K x 16)
程序存储器类型: 闪存
RAM 容量: 8K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 3.6 V
数据转换器: A/D 9x12b,D/A 4x12b
振荡器型: 内部
工作温度: -10°C ~ 95°C
封装/外壳: 108-LFBGA,CSPBGA
包装: 托盘
Data Sheet
ADuC7121
Rev. B | Page 47 of 96
Example Source Code
T2LD = 5;
TCON = 0x480;
while ((T2VAL == t2val_old) || (T2VAL > 3))
//ensures timer value loaded
IRQEN = 0x10;
//enable T2 interrupt
PLLKEY1 = 0xAA;
PLLCON = 0x01;
PLLKEY2 = 0x55;
POWKEY1 = 0x01;
POWCON =
0x27;
// set
core into nap mode
POWKEY2 = 0xF4;
External Clock Selection
To switch to an external clock on P1.4 (of the
P1.4/PWM1/ECLK/XCLK/PLAI[8] pin), configure P1.4 in
Mode 2. The external clock can be up to 41.78 MHz.
Example Source Code
T2LD = 5;
TCON = 0x480;
while ((T2VAL == t2val_old) || (T2VAL > 3))
//ensures timer value loaded
IRQEN = 0x10;
//enable T2 interrupt
PLLKEY1 = 0xAA;
PLLCON = 0x03; //Select external clock
PLLKEY2 = 0x55;
POWKEY1 = 0x01;
POWCON = 0x27; // Set Core into Nap mode
POWKEY2 = 0xF4;
Power Control System
A choice of operating modes is available on the ADuC7121.
Table 65 describes what part of the ADuC7121 is powered on in
the different modes and indicates the power-up time. Table 66
gives some typical values of the total current consumption (analog
+ digital supply currents) in the different modes, depending on
the clock divider bits. The ADC is turned off. Note that these
values also include current consumption of the regulator and other
parts on the test board on which these values were measured.
Table 65. Operating Modes
Mode
Core
Peripherals
PLL
XTAL/Timer2/Timer3
External IRQ
Start-Up/Power-On Time
Active
On
66 ms at CD = 0
Pause
On
24 ns at CD = 0; 3.06 s at CD = 7
Nap
On
24 ns at CD = 0; 3.06 s at CD = 7
Sleep
On
1.58 ms
Stop
On
1.7 ms
Table 66. Typical Current Consumption at 25°C
PC[2:0]
Mode
CD = 0
CD = 1
CD = 2
CD = 3
CD = 4
CD = 5
CD = 6
CD = 7
000
Active
33.1
21.2
13.8
10
8.1
7.2
6.7
6.45
001
Pause
22.7
13.3
8.5
6.1
4.9
4.3
4
3.85
010
Nap
3.8
011
Sleep
0.4
100
Stop
0.4
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