MNSC140CORE datasheet(26/88 Pages) FREESCALE

26 / 88 page

MSC8122 Technical Data, Rev. 13

1-16

Freescale Semiconductor

Signals/Connections

1.6 GPIO, TDM, UART, and Timer Signals

The general-purpose input/output (GPIO), time-division multiplexed (TDM), universal asynchronous

receiver/transmitter (UART), and timer signals are grouped together because they use a common set of signal lines.

Individual assignment of a signal to a specific signal line is configured through internal registers. Table 1-7

describes the signals in this group.

Table 1-7.

GPIO, TDM, UART, Ethernet, and Timer Signals

Signal Name

Type

Description

GPIO0

CHIP_ID0

IRQ4

ETHTXD0

Input/ Output

Input

Output

General-Purpose Input Output 0

One of 32 GPIO pins used as GPIO or as one of two dedicated inputs or one of two dedicated outputs.

Chip ID 0

Determines the chip ID of the MSC8122 DSI. It is sampled on the rising edge of PORESET signal.

Interrupt Request 4

One of fifteen external lines that can request a service routine, via the internal interrupt controller, from the

SC140 core.

Ethernet Transmit Data 0

For MII or RMII mode, bit 0 of the Ethernet transmit data.

GPIO1

TIMER0

CHIP_ID1

IRQ5

ETHTXD1

Input/ Output

Input

Output

General-Purpose Input Output 1

One of 32 GPIO pins used as GPIO or as one of two dedicated inputs or one of two dedicated outputs.

Timer 0

Each signal is configured as either input to or output from the counter. See the MSC8122 Reference

Manual for configuration details.

Chip ID 1

Determines the chip ID of the MSC8122 DSI. It is sampled on the rising edge of PORESET signal.

Interrupt Request 5

One of the fifteen external lines that can request a service routine, via the internal interrupt controller, from

the SC140 core.

Ethernet Transmit Data 1

For MII or RMII mode, bit 1 of the Ethernet transmit data.

GPIO2

TIMER1

CHIP_ID2

IRQ6

Input/ Output

Input

General-Purpose Input Output 2

One of 32 GPIO pins used as GPIO or as one of two dedicated inputs or one of two dedicated outputs. For

details, refer to the MSC8122 Reference Manual.

Timer 1

Each signal is configured as either input to or output from the counter. For the configuration of the pin

direction, refer to the MSC8122 Reference Manual.

Chip ID 2

Determines the chip ID of the MSC8122 DSI. It is sampled on the rising edge of PORESET signal.

Interrupt Request 6

One of the fifteen external lines that can request a service routine, via the internal interrupt controller, from

the SC140 core.

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