19

ATSAM9743

1773B–DRMSD–11/02

Memory Map

Note:

If programmed as an alternate function, WCSO is generated even if the firmware accesses the

built-in Flash or ROM. In this case the external ROM data is not used.

Flash

Programing

Performance

Typical programming times for the 24K x 16 Flash are as follows:

MIDI baud rate 31250 bauds, TEST0 = 1, TEST2 = 0: 33 seconds

57600 bauds, TEST0 = 1, TEST2 = 1: 19 seconds

Crystal

Compensation/

LFT FIlter

Figure 11. Recommended Crystal Compensation and LFT Filter

Note:

The ATSAM9743 uses a low power oscillator. No compensation capacitor is necessary. How-

ever, because the crystal drive is very small, it is mandatory to keep the X1/X2 traces as small

as possible.

Table 13. Description of the ATSAM9743 Memory Map

Address Low

Address High

Access

0000:0000

0000:00FF

ATSAM97xx Standard Routine ROM

0000:0100

0000:03FF

Built-in ROM for Flash program & debug routines

0000:400

0000:7FFF

Optional external ROM

0000:8000

0000:DFFF

Built-in Flash (24K x 16)

0000:E000

001F:FFFF

Optional external ROM (WCS0)

0020:0000

0020:07FF

Built-in SRAM (2K x 16)

0020:0800

0020:0815

ATSAM9743 specific I/Os

0020:0816

01FF:FFFF

Not used

0200:0000

021F:FFFF

Optional external RAM (WCS1)

LFT

X2

X1

X1

R1

100

Ω

C2

22p

C3

10n