参数资料
型号: ADUC7126BSTZ126IRL
厂商: Analog Devices Inc
文件页数: 61/108页
文件大小: 0K
描述: IC MCU 16/32B 126KB FLASH 80LQFP
标准包装: 1,000
系列: MicroConverter® ADuC7xxx
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 41.78MHz
连通性: EBI/EMI,I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 40
程序存储器容量: 126KB(63K x 16)
程序存储器类型: 闪存
RAM 容量: 32K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
数据转换器: A/D 12x12b,D/A 4x12b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 80-LQFP
包装: 带卷 (TR)
ADuC7124/ADuC7126
Data Sheet
Rev. C | Page 56 of 108
MMRs and Keys
The operating mode, clocking mode, and programmable clock
divider are controlled via three MMRs, PLLCON (see Table 73),
and POWCONx. PLLCON controls the operating mode of the
clock system, POWCON0 controls the core clock frequency and
the power-down mode, and POWCON1 controls the clock
frequency to I2C and SPI.
Table 72. PLLKEYx Registers
Name
Address
Default Value
Access
PLLKEY1
0xFFFF0410
0x0000
W
PLLKEY2
0xFFFF0418
0x0000
W
PLLCON Register
Name:
PLLCON
Address:
0xFFFF0414
Default Value:
0x21
Access:
Read/write
Table 73. PLLCON MMR Bit Descriptions
Bit
Value
Name
Description
[7:6]
Reserved.
5
OSEL
32 kHz PLL input selection.
Set by the user to select the internal
32 kHz oscillator. Set by default.
Cleared by the user to select the
external 32 kHz crystal.
[4:2]
Reserved.
[1:0]
MDCLK
Clocking modes.
00
Reserved.
01
PLL. Default configuration.
10
Reserved.
11
External clock on the P0.7 Pin.
To prevent accidental programming, a certain sequence must be
followed to write to the PLLCON register.The PLLCON write
sequence is as follows:
1.
Write Code 0xAA to Register PLLKEY1.
2.
Write user value to Register PLLCON.
3.
Write Code 0x55 to Register PLLKEY2.
Table 74. POWKEYx Registers
Name
Address
Default Value
Access
POWKEY1
0xFFFF0404
0x0000
W
POWKEY2
0xFFFF040C
0x0000
W
POWKEY1 and POWKEY2 are used to prevent accidental
programming to POWCON0.
POWCON0 Register
Name:
POWCON0
Address:
0xFFFF0408
Default Value:
0x0003
Access:
Read/write
Table 75. POWCON0 MMR Bit Descriptions
Bit
Value
Name
Description
7
Reserved.
[6:4]
PC
Operating modes.
000
Active mode.
001
Pause mode.
010
Nap mode.
011
Sleep mode. IRQ0 to IRQ3 and Timer2
can wake up the part.
100
Stop mode. IRQ0 to IRQ3 can wake
up the part.
Others
Reserved.
3
Reserved.
[2:0]
CD
CPU clock divider bits.
000
41.78 MHz.
001
20.89 MHz.
010
10.44 MHz.
011
5.22 MHz.
100
2.61 MHz.
101
1.31 MHz.
110
653 kHz.
111
326 kHz.
To prevent accidental programming, a certain sequence must be
followed to write to the POWCONx register. The POWCON0
write sequence is as follows:
1.
Write Code 0x01 to Register POWKEY1.
2.
Write a user value to Register POWCON0.
3.
Write Code 0xF4 to Register POWKEY2.
Table 76. POWKEYx Registers
Name
Address
Default Value
Access
POWKEY3
0xFFFF0434
0x0000
W
POWKEY4
0xFFFF043C
0x0000
W
POWKEY3 and POWKEY4 are used to prevent accidental
programming to POWCON1.
POWCON1 Register
Name:
POWCON1
Address:
0xFFFF0438
Default Value:
0x124
Access:
Read/write
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