SEC2410 datasheet(49/283 Pages) MICROCHIP

49 / 283 page

 2013 - 2014 Microchip Technology Inc.

DS00001587C-page 49

SEC2410/SEC4410

8.2.3

GPIO MUXING TABLE

TABLE 8-14:

UTILITY CONFIGURATION REGISTER 1

UTIL_CONFIG1

(0x080A RESET=0x00)

Utility Configuration Register 1

Bit

Name

R/W

Description

7:3

Reserved

Always read ‘0’

SPI_DISABLE

R/W

After reset the SPI interface is always enabled. If the firmware

does not detect a SPI rom externally, it sets this bit. This disable

the SPI interface, and enables GPIOs.

UART_ENABLE

R/W

This bit enables the UART pins.

0 - GPIOs go to GPIO pins

1 - The UART TX and RX go the GPIO11,12.

Reserved

Always read ‘0’

TABLE 8-15:

PIN MUX SELECT REGISTER

PIN_MUX_SEL

(0x080C RESET=0x00)

Pin Mux Select Register

Bit

Name

R/W

Description

SC_LED_SEL

R/W

Pin LED0 / SC_LED_ACT_N function selected with this bit:

‘0’ = LED controlled from GPIO0 / LED0

‘1’ = LED controlled by Smart Card interface

Note: Please see LED0_GPIO0_CTL for details of using gpio

versus LED

SD2_GPIO_EN

R/W

Setting this bit enables the GPIOs that are multiplexed with the

second SecureDigital interface: GPIO17, GPIO18, GPIO19,

GPIO20, GPIO21, GPIO22, GPIO23, GPIO24, GPIO25, GPIO26

Note: GPIO16, is always a GPIO, and is not affected by this bit.

SD2_HI_GPIO EN

R/W

Setting this bit enables the four GPIOs that are multiplexed with

the upper four data bits of the second SecureDigital interface:

GPIO22, GPIO23, GPIO24, GPIO25

This bit has no effect if SD2_GPIO_EN is set.

SC_GPIO_EN

R/W

Setting this bit enables the five GPIOs that are multiplexed with

the SmartCard interface: GPIO27, GPIO28, GPIO29, GPIO30,

GPIO31

3:0

MUX_SEL

R/W

The single Flash Media is selected with the following values:

0001

Reserved

0010

Reserved

0100

Reserved

1000

Secure Digital

TABLE 8-16:

GPIO MUXING TABLE

Name

Hardware Mux

Mux Control bit

SW GPIO

Function

Comment

GPIO0

CR_ACTIVTY/

LED0

LED0_GPIO_CTL

Unassigned

GPIO1

SC_LED_ACT_N/

LED1

LED1_GPIO_CTL

LED_CTL

Unassigned

GPIO2

SPI_DI

SPI_DISABLE

Unassigned

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