NUC505-YO2Y datasheet(78/130 Pages) NUVOTON

78 / 130 page

NUC505

July. 26, 2018

Page 78 of 130

Rev.1.08

SPI

Flash

0x2000_AB00

0x2000_B2FF

2 Kbytes

0x2000_0000

0x2001_FFFF

0x0000_0000

0x0000_07FF

0x0000_0800

0x001F_FFFF

Vector

mapping

SYS_RVMPADDR[31:0] = 0x2000_AB00

SYS_RVMPLEN[31:24] = 0x02

Example:

Figure 6.2-4 Vector Map Module Block

6.2.7

AHB Bus Arbitration

The internal bus of NUC505 is an AHB-Compliant Bus and supports to connect with the standard AHB

master or slave. The NUC505 AHB arbiter provides a choice of two arbitration algorithms for

simultaneous requests. These two arbitration algorithms are the Fixed-priority mode and the Round-

robin- priority (rotate) mode. The selection of modes and types is determined in the PRISEL field of

the SYS_AHBCTL control register.

Fixed Priority Mode

6.2.7.1

Fixed priority mode is selected if PRISEL = 0. The order of priorities on the AHB mastership among

the on-chip master modules are listed in Table 6.2-3.

Priority Sequence

(PRISEL = 0)

AHB Bus Priority

1 (Lowest)

Cortex-M4 I

Cortex-M4 D

Cortex-M4 System

SPIM

USBD

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