
GPIO, TDM, UART, and Timer Signals
MSC8122 Technical Data, Rev. 13
Freescale Semiconductor
1-17
GPIO3
TDM3TSYN
IRQ1
ETHTXD2
Input/ Output
Input/ Output
Input
Output
General-Purpose Input Output 3
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
GPIO programming model.
TDM3 Transmit Frame Sync
Transmit frame sync for TDM 3.
Interrupt Request 1
One of fifteen external lines that can request a service routine, via the internal interrupt controller, from the
SC140 core.
Ethernet Transmit Data 2
For MII mode only, bit 2 of the Ethernet transmit data.
GPIO4
TDM3TCLK
IRQ2
ETHTX_ER
Input/ Output
Input
Input
Output
General-Purpose Input Output 4
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
GPIO programming model.
TDM3 Transmit Clock
Transmit Clock for TDM 3
Interrupt Request 2
One of fifteen external lines that can request a service routine, via the internal interrupt controller, from the
SC140 core.
Ethernet Transmit Data Error
For MII mode only, indicates whether a transmit data error occurred.
GPIO5
TDM3TDAT
IRQ3
ETHRXD3
Input/ Output
Input/ Output
Input
Input
General-Purpose Input/Output 5
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
GPIO programming model.
TDM3 Serial Transmitter Data
The serial transmit data signal for TDM 3. As an output, it provides the DATA_D signal for TDM 3. For
configuration details, refer to the
MSC8122
Reference Manual
chapter describing TDM operation.
Interrupt Request 3
One of fifteen external lines that can request a service routine, via the internal interrupt controller, from the
SC140 core.
Ethernet Receive Data 3
For MII mode only, bit 3 of the Ethernet receive data.
GPIO6
TDM3RSYN
IRQ4
ETHRXD2
Input/ Output
Input/ Output
Input
Input
General-Purpose Input Output 6
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
GPIO programming model.
TDM3 Receive Frame Sync
The receive sync signal for TDM 3. As an input, this can be the DATA_B data signal for TDM 3.For
configuration details, refer to the
MSC8122
Reference Manual
chapter describing TDM operation.
Interrupt Request 4
One of fifteen external lines that can request a service routine, via the internal interrupt controller, from the
SC140 core.
Ethernet Receive Data 2
For MII mode only, bit 2 of the Ethernet receive data.
Table 1-7.
GPIO, TDM, UART, Ethernet, and Timer Signals (Continued)
Signal Name
Type
Description