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TSB43AB21 Datasheet(PDF) 64 Page - Texas Instruments |
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TSB43AB21 Datasheet(HTML) 64 Page - Texas Instruments |
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64 / 109 page  4–23 4.24 Isochronous Transmit Interrupt Mask Register The isochronous transmit interrupt mask set/clear register enables the isochTx interrupt source on a per-channel basis. Reads from either the set register or the clear register always return the contents of the isochronous transmit interrupt mask register. In all cases the enables for each interrupt event align with the isochronous transmit interrupt event register bits detailed in Table 4–17. Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Name Isochronous transmit interrupt mask Type R R R R R R R R R R R R R R R R Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Name Isochronous transmit interrupt mask Type R R R R R R R R RSC RSC RSC RSC RSC RSC RSC RSC Default 0 0 0 0 0 0 0 0 X X X X X X X X Register: Isochronous transmit interrupt mask Offset: 98h set register 9Ch clear register Type: Read/Set/Clear, read-only Default: 0000 00XXh 4.25 Isochronous Receive Interrupt Event Register The isochronous receive interrupt event set/clear register reflects the interrupt state of the isochronous receive contexts. An interrupt is generated on behalf of an isochronous receive context if an INPUT_* command completes and its interrupt bits are set to 1. Upon determining that the isochRx (bit 7) interrupt in the interrupt event register at OHCI offset 80h/84h (see Section 4.21, Interrupt Event Register) has occurred, software can check this register to determine which context(s) caused the interrupt. The interrupt bits are set to 1 by an asserting edge of the corresponding interrupt signal or by writing a 1 in the corresponding bit in the set register. The only mechanism to clear a bit in this register is to write a 1 to the corresponding bit in the clear register. See Table 4–18 for a complete description of the register contents. Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Name Isochronous receive interrupt event Type R R R R R R R R R R R R R R R R Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Name Isochronous receive interrupt event Type R R R R R R R R R R R R RSC RSC RSC RSC Default 0 0 0 0 0 0 0 0 0 0 0 0 X X X X Register: Isochronous receive interrupt event Offset: A0h set register A4h clear register [returns the contents of isochronous receive interrupt event register bit-wise ANDed with the isochronous receive mask register when read] Type: Read/Set/Clear, read-only Default: 0000 000Xh Table 4–18. Isochronous Receive Interrupt Event Register Description BIT FIELD NAME TYPE DESCRIPTION 31–4 RSVD R Reserved. Bits 31–4 return 0s when read. 3 isoRecv3 RSC Isochronous receive channel 3 caused the interrupt event register bit 7 (isochRx) interrupt. 2 isoRecv2 RSC Isochronous receive channel 2 caused the interrupt event register bit 7 (isochRx) interrupt. 1 isoRecv1 RSC Isochronous receive channel 1 caused the interrupt event register bit 7 (isochRx) interrupt. 0 isoRecv0 RSC Isochronous receive channel 0 caused the interrupt event register bit 7 (isochRx) interrupt. |
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