21

ATSAM9753

1774D–DRMSD–11/02

Note:

1. In alternate output mode, GPIO3 is configured as output and GPIO3 = DBACK

(ATSAM9753_GPIO_reg[1]).

Note:

1. In alternate mode, GPIO4 is used for serial debug data:

In input, ATSAM9753_GPIO[2] (DBIN) = GPIO4

In output, GPIO4 = ATSAM9753_GPIO_Reg[2] (DBOUT).

Table 20. GPIO3

Normal

Input Mode

Normal

Output Mode

Alt Output

Mode

(1)

ATSAM97xx_config_Reg[3]

0

1

x

DEBUG Pin

110

Table 21. GPIO4

Normal

Input Mode

Normal

Output Mode

Alt Output

Mode

(1)

Alt Output

Mode

(1)

ATSAM9753_GPIO_Reg[6]

0

1

x

x

ATSAM9753_GPIO_Reg[0]

x

x

0

1

DEBUG Pin

1

1

0

0