參數(shù)資料
型號: ISP1161ABM
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: Full-speed Universal Serial Bus single-chip host and device controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-414-1, LQFP-64
文件頁數(shù): 23/134頁
文件大小: 587K
代理商: ISP1161ABM
Philips Semiconductors
ISP1161A
Full-speed USB single-chip host and device controller
Product data
Rev. 03 — 23 December 2004
23 of 134
9397 750 13962
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Event A (see
Figure 22
): When an interrupt event occurs (for example, SOF interrupt)
with bit INTENA set to logic 0, an interrupt will not be generated at pin INT2.
However, it will be registered in the corresponding DcInterrupt register bit.
Event B (see
Figure 22
): When bit INTENA is set to logic 1, pin INT2 is asserted
because bit SOF in the DcInterrupt register is already asserted.
Event C (see
Figure 22
): If the firmware sets bit INTENA to logic 0, pin INT2 will still
be asserted. The bold dashed line shows the desired behavior of pin INT2.
De-assertion of pin INT2 can be achieved in the following manner. Bits[23:8] of the
DcInterrupt register are endpoint interrupts. These interrupts are cleared on reading
their respective DcEndpointStatus register. Bits[7:0] of the DcInterrupt register are
bus status and EOT interrupts that are cleared on reading the DcInterrupt register.
Make sure that bit INTENA is set to logic 1 when you perform the clear interrupt
commands.
For more information on interrupt control, see
Section 13.1.3
,
Section 13.1.5
and
Section 13.3.6
.
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