MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
23-1
GPIO
23
The MSC8113 device has 32 general-purpose I/O (GPIO) ports that are multiplexed as either
GPIO ports or dedicated peripheral interface ports. In addition, fifteen of the GPIOs can be
configured to serve as Ethernet interface ports, and fifteen of the GPIOs can be configured to
generate interrupts to the Global Interrupt Controller (GIC). As GPIOs, each port is configured as
an input or output (with a register for data output that is read or written at any time). If configured
as output, the GPIO ports can also be configured as open-drain (that is, configured in an active
low wired-OR configuration on the board). In this mode, an output drives a zero voltage but goes
to tri-state when driving a high voltage. GPIO ports do not have internal pull-up resistors. The
dedicated MSC8113 peripheral functions multiplexed with the GPIO ports are grouped to
maximize the usefulness of the ports in the greatest number of MSC8113 applications.
Note:
To understand the port assignment capability described in this chapter, you must first
understand the Ethernet, Time-Division Multiplexing (TDM), timers, and UART
peripherals.
23.1 Features
Following are the key features of the GPIO ports:
32 GPIO ports.
All ports are bidirectional.
All ports have alternate on-device peripheral functions.
All ports are set as GPIO inputs at system reset.
All port values can be read while the port is connected to an internal peripheral.
All ports have open-drain output capability.
Fifteen of the GPIOs can be used as interrupt inputs.
Fifteen of the GPIOs can be used as Ethernet interface ports
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
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Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...