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HT82A525R Folha de dados(PDF) 41 Page - Holtek Semiconductor Inc |
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HT82A525R Folha de dados(HTML) 41 Page - Holtek Semiconductor Inc |
41 / 71 page USB Interface The HT82A525R has 4 Endpoints (EP0~EP3). EP0~EP1 are support Interrupt transfer, EP2~EP3 is support Bulk transfer. There are 12 registers, including USC (20H), USR (21H), UCC (22H), AWR (address+remote wake-up 23H), STALL (24H), SIES (25H), MISC (26H), SETIO (27H), FIFO0 (28H), FIFO1 (29H), FIFO2 (2AH) and FIFO3 (2BH) used for the USB function. The FIFO size of each FIFO is 8 byte (FIFO0), 8 byte (FIFO1), 64 byte (FIFO2) and 128 byte (FIFO3), and total of 208 bytes. URD (bit7 of the USC) is USB reset signal control function definition bit. Bit No. Label R/W Function 0 SUSP R USB suspend indication flag 0: not in suspend mode 1: in suspend mode When this bit is set to ²1² (set by SIE), it indicates that the USB bus enters the suspend mode. The USB interrupt is also triggered on any changes of this bit. 1 RMWK R/W USB remote wake-up command 0: disable 1: enable It is set by the MCU to force the USB host leaving the suspend mode. Set RMWK bit to ²1² to enable remote wake-up. When this bit is set to ²1²,a2ms delay for clearing this bit to ²0² is needed to insure that the RMWK command is accepted by the SIE. 2 URST R/W USB reset indication bit 0: no USB reset 1: USB reset This bit is set or cleared by USB SIE. When the URST is set to ²1², this indicates that a USB reset has occurred and a USB interrupt will be initialized. 3 RESUME R USB resume indication bit 0: in suspend mode 1: resume When the USB leaves the suspend mode, this bit is set to ²1² (set by SIE). This bit will appear for 20ms, waiting for the MCU to detect it. When the RESUME is set by SIE, an interrupt will be generated to wake-up the MCU. In order to detect the suspend state, MCU should set the USBCKEN and SUSP2 (in the SCC register) to enable the SIE detect function. The RESUME will be cleared while the SUSP is set to ²0². When MCU detects the SUSP, the RESUME (which causes MCU to wake-up) should be remembered and token into consideration. 4 V33O R/W V33O enable control bit 0: turn off 1: turn on 5 PLL R/W PLL enable control bit 0: turn on 1: turn off 6 ¾¾ Unused bit, read as ²0² 7 URD R/W USB reset signal control function definition 1: Will reset the MCU 0: Cannot reset the MCU USC (20H) Definitions Rev. 1.80 41 March 11, 2016 HT82A525R I/O Type USB 8-Bit OTP MCU with SPI |
Nº de peça semelhante - HT82A525R_16 |
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Descrição semelhante - HT82A525R_16 |
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