DSP56857 datasheet(203/662 Pages) FREESCALE

203 / 662 page

Overview, Rev. 4

Freescale Semiconductor

8-25

8.7.9.4 Receiver Idle Interrupt Priority Level (SCI1_RIDL IPL)—Bits 5–4

These fields are used to set the interrupt priority levels for certain peripheral IRQs. These IRQs

are limited to priorities zero through two and are disabled by default.

•

00 = IRQ disabled (default)

•

01 = IRQ is priority level 0

•

10 = IRQ is priority level 1

•

11 = IRQ is priority level 2

8.7.9.5 Transmitter Idle Interrupt Priority Level (SCI1_TIDL IPL)—Bits 3–2

These fields are used to set the interrupt priority levels for certain peripheral IRQs. These IRQs

are limited to priorities zero through two and are disabled by default.

•

00 = IRQ disabled (default)

•

01 = IRQ is priority level 0

•

10 = IRQ is priority level 1

•

11 = IRQ is priority level 2

8.7.9.6 Transmitter Empty Interrupt Priority Level (SCI1_XMIT IPL)

—Bits 1–0

These fields are used to set the interrupt priority levels for certain peripheral IRQs. These IRQs

are limited to priorities zero through two and are disabled by default.

•

00 = IRQ disabled (default)

•

01 = IRQ is priority level 0

•

10 = IRQ is priority level 1

•

11 = IRQ is priority level 2

8.7.10 Vector Base Address Register (VBA)

Figure 8-12. Vector Base Address Register (VBA)

See Programmer’s Sheet on Appendix page B - 37

Base + $9

Read

VECTOR_BASE_ADDRESS

Write

Reset

00000

000

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