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257
32133D鈥�11/2011
UC3D
18.6.2
Advanced Operation
18.6.2.1
Peripheral I/O Pin Control
When a GPIO pin is assigned to a peripheral function, i.e. the corresponding bit in GPER is zero,
output and output enable is controlled by the selected peripheral pin. In addition the peripheral
may control some or all of the other GPIO pin functions listed in Table 18-1, if the peripheral sup-
ports those features. All pin features not controlled by the selected peripheral is controlled by the
GPIO.
Refer to the Module Configuration section for details regarding implemented GPIO pin functions
and to the Peripheral chapter for details regarding I/O pin function control.
18.6.2.2
Pull-up Resistor Control
Pull-up can be configured for each GPIO pin. Pull-up allows the pin and any connected net to be
pulled up to VDD if the net is not driven.
Pull-up is useful for detecting if a pin is unconnected or if a mechanical button is pressed, for var-
ious communication protocols and to keep unconnected pins from floating.
Pull-up can be enabled and disabled by writing a one and a zero respectively to the correspond-
ing bit in the Pull-up Enable Register (PUER).
18.6.2.3
Output Pin Timings
Figure 18-3 shows the timing of the GPIO pin when writing to the Output Value Register (OVR).
The same timing applies when performing a 鈥榮et鈥� or 鈥榗lear鈥� access, i.e. writing to OVRS or
OVRC. The timing of PVR is also shown.
Figure 18-3. Output Pin Timings
18.6.2.4
Interrupts
The GPIO can be configured to generate an interrupt when it detects a change on a GPIO pin.
Interrupts on a pin are enabled by writing a one to the corresponding bit in the Interrupt Enable
Table 18-1.
I/O Pin function Control
Function name
GPIO mode
Peripheral mode
Output
OVR
Peripheral
Output enable
ODER
Peripheral
Pull-up
PUER
Peripheral if supported, else GPIO
PB Access
CLK_GPIO
Write OVR to 1
Write OVR to 0
OVR / I/O Line
PVR
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VI-B72-IW-F2 CONVERTER MOD DC/DC 15V 100W
V24C12H150B2 CONVERTER MOD DC/DC 12V 150W
VI-B71-IX-F3 CONVERTER MOD DC/DC 12V 75W
VI-B71-IX-F2 CONVERTER MOD DC/DC 12V 75W
VI-B71-IX-F1 CONVERTER MOD DC/DC 12V 75W
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ATUC128D4-Z1UT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3D4 128KB FL 85C RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁告摎绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁告摎 RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT
ATUC128L3U-AUR 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-128KB Flash 64QFP 85C green T&R RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁告摎绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁告摎 RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT
ATUC128L3U-AUT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-128KB Flash 64QFP 85C green TRAY RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁告摎绺界窔瀵害:32 bit 鏈€澶ф檪閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜鍣ㄥぇ灏�:64 KB 鏁告摎 RAM 澶у皬:26 KB 鐗囦笂 ADC:Yes 宸ヤ綔闆绘簮闆诲:2.97 V to 3.63 V 宸ヤ綔婧害鑼冨湇:- 40 C to + 105 C 灏佽 / 绠遍珨:LQFP-80 瀹夎棰ㄦ牸:SMD/SMT