參數(shù)資料
型號: ADUC7126BSTZ126-RL
廠商: Analog Devices Inc
文件頁數(shù): 88/108頁
文件大?。?/td> 0K
描述: IC MCU 16/32B 126KB FLASH 80LQFP
標(biāo)準(zhǔn)包裝: 1,000
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 41.78MHz
連通性: EBI/EMI,I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 40
程序存儲器容量: 126KB(63K x 16)
程序存儲器類型: 閃存
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 12x12b,D/A 4x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 80-LQFP
包裝: 帶卷 (TR)
ADuC7124/ADuC7126
Data Sheet
Rev. C | Page 80 of 108
Table 114. PWM Output Selection, HMODE = 1
PWMCON0 MMR1
PWM Outputs2
ENA
HOFF
POINV
DIR
PWM0
PWM1
PWM2
PWM3
0
X
1
X
1
X
1
0
1
0
1
0
HS
LS
1
0
1
HS
LS
0
1
0
1
0
HS
LS
1
0
1
HS
LS
1 X = don’t care.
2 HS = high side, LS = low side.
On power-up, PWMCON0 defaults to 0x12 (HOFF = 1 and
HMODE = 1). All GPIO pins associated with the PWM are
configured in PWM mode by default (see Table 115).
Table 115. Compare Registers
Name
Address
Default Value
Access
PWM0COM0
0xFFFF0F84
0x0000
R/W
PWM0COM1
0xFFFF0F88
0x0000
R/W
PWM0COM2
0xFFFF0F8C
0x0000
R/W
PWM1COM0
0xFFFF0F94
0x0000
R/W
PWM1COM1
0xFFFF0F98
0x0000
R/W
PWM1COM2
0xFFFF0F9C
0x0000
R/W
PWM2COM0
0xFFFF0FA4
0x0000
R/W
PWM2COM1
0xFFFF0FA8
0x0000
R/W
PWM2COM2
0xFFFF0FAC
0x0000
R/W
The PWM trip interrupt can be cleared by writing any value to
the PWMCLRI MMR. Note that, when using the PWM trip
interrupt, users should make sure that the PWM interrupt
has been cleared before exiting the ISR. This prevents
generation of multiple interrupts.
PWM Convert Start Control
The PWM can be configured to generate an ADC convert start
signal after the active low side signal goes high. There is a
programmable delay between the time that the low-side signal
goes high and the convert start signal is generated.
This is controlled via the PWMCON1 MMR. If the delay
selected is higher than the width of the PWM pulse, the
interrupt remains low.
Table 116. PWMCON1 MMR Bit Descriptions (Address =
0xFFFF0FB4; Default Value = 0x00)
Bit
Value
Name
Description
7
CSEN
Set to 1 by the user to enable the PWM
to generate a convert start signal.
Cleared by user to disable the PWM
convert start signal.
CSD3
Convert start delay. Delays the convert
start signal by a number of clock
pulses.
CSD2
CSD1
CSD0
0000
Four clock pulses.
0001
Eight clock pulses.
0010
12 clock pulses.
0011
16 clock pulses.
0100
20 clock pulses.
0101
24 clock pulses.
0110
28 clock pulses.
0111
32 clock pulses.
1000
36 clock pulses.
1001
40 clock pulses.
1010
44 clock pulses.
1011
48 clock pulses.
1100
52 clock pulses.
1101
56 clock pulses.
1110
60 clock pulses.
[3:0]
1111
64 clock pulses.
When calculating the time from the convert start delay to the
start of an ADC conversion, the user must take account of
internal delays. The following example shows the case of a delay
of four clocks. One additional clock is required to pass the
convert start signal to the ADC logic. Once the ADC logic
receives the convert start signal, an ADC conversion begins on
the next ADC clock edge (see Figure 50).
UCLK
LOW SIDE
COUNT
PWM SIGNAL
SIGNAL PASSED
TO ADC LOGIC
TO CONVST
0
9123-
0
45
Figure 50. ADC Conversion
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