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29闋�绗�730闋�绗�731闋�绗�732闋�绗�733闋�绗�734闋�绗�735闋�绗�736闋�绗�737闋�绗�738闋�绗�739闋�绗�740闋�绗�741闋�绗�742闋�绗�743闋�绗�744闋�绗�745闋�绗�746闋�绗�747闋�绗�748闋�绗�749闋�绗�750闋�绗�751闋�绗�752闋�绗�753闋�绗�754闋�绗�755闋�
296
32133D鈥�11/2011
UC3D
Figure 19-6. Control Write
Control read
Figure 19-7 on page 296 shows a control read transaction. The USBC has to manage the simul-
taneous write requests from the CPU and USB host.
Figure 19-7. Control Read
A NAK handshake is always generated as the first status stage command. The UESTAn.NAKINI
bit is set. It allows the user to know that the host aborts the IN data stage. As a consequence,
the user should stop processing the IN data stage and should prepare to receive the OUT status
stage by checking the UESTAn.RXOUTI bit.
The OUT retry is always ACKed. This OUT reception sets RXOUTI. Handle this with the follow-
ing software algorithm:
// process the IN data stage
set TXINI
wait for RXOUTI (rising) OR TXINI (falling)
if RXOUTI is high, then process the OUT status stage
if TXINI is low, then return to process the IN data stage
Once the OUT status stage has been received, the USBC waits for a SETUP request. The
SETUP request has priority over all other requests and will be ACKed.
SETUP
RXSTPI
RXOUTI
TXINI
USB Bus
HW
SW
OUT
HW
SW
OUT
HW
SW
IN
NAK
SW
DATA
SETUP
STATUS
SETUP
RXSTPI
RXOUTI
TXINI
USB Bus
HW
SW
IN
HW
SW
IN
OUT
NAK
SW
HW
Wr Enable
HOST
Wr Enable
CPU
DATA
SETUP
STATUS
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
ATV2500BQL-25KI IC CPLD QTR PW L 25NS CER 44JLCC
ATXMEGA256A3B-AU MCU AVR 256KB FLASH 64TQFP
AX2000-2FGG1152I IC FPGA AXCELERATOR 2M 1152-FBGA
B78476A1889A3 MODULE MAGNETIC LAN 2-PORT SMD
B78476A7694A3 MODULE MAGNETIC LAN 1-PORT SMD
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ATUC64D4-Z1UR 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3D4 64KB FL 85C RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) 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�(f膿ng)鏍�:SMD/SMT
ATUC64D4-Z1UT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3D4 64KB FL 85C RoHS:鍚� 鍒堕€犲晢:Texas Instruments 鏍稿績:C28x 铏曠悊鍣ㄧ郴鍒�:TMS320F28x 鏁�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) 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�(f膿ng)鏍�:SMD/SMT
ATUC64L3U-AUR 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-64KB 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�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) 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�(f膿ng)鏍�:SMD/SMT
ATUC64L3U-AUT 鍔熻兘鎻忚堪:32浣嶅井鎺у埗鍣� - MCU UC3L-64KB 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�(sh霉)鎿�(j霉)绺界窔瀵害:32 bit 鏈€澶ф檪(sh铆)閻橀牷鐜�:90 MHz 绋嬪簭瀛樺劜(ch菙)鍣ㄥぇ灏�:64 KB 鏁�(sh霉)鎿�(j霉) 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�(f膿ng)鏍�:SMD/SMT