MSC8113 Reference Manual, Rev. 0
3-4
Freescale Semiconductor
External Signals
3.4 Direct Slave Interface, System Bus, Ethernet, and Interrupt
Signals
The direct slave interface (DSI) is combined with the system bus because they share some
common signal lines. Individual assignment of a signal to a specific signal line is configured
through internal registers. Table 3-5 describes the signals in this group. Although there are
fifteen interrupt request (IRQ) connections to the core processors, there are multiple external
lines that can connect to these internal signal lines. After reset, the default configuration enables
only
IRQ[1–7]
, but includes two input lines each for
IRQ[1–3]
and
IRQ7
. The designer must select one
line for each required interrupt and reconfigure the other external signal line or lines for alternate
functions. Additional alternate IRQ lines and
IRQ[8–15]
are enabled through the GPIO signal lines.
HRESET
Input/
Output
Hard Reset
When asserted as an input, this signal causes the MSC8113 to enter the hard reset state.
After the device enters a hard reset state, it drives the signal as an open-drain output.
SRESET
Input/
Output
Soft Reset
When asserted as an input, this signal causes the MSC8113 to enter the soft reset state.
After the device enters a soft reset state, it drives the signal as an open-drain output.
Table 3-5. DSI, System Bus, Ethernet, and Interrupt Signals
Signal Name
Type
Description
HD0
SWTE
Input/
Output
Input
Host Data Bus 0
Bit 0 of the DSI data bus.
Software Watchdog Timer Disable.
It is sampled on the rising edge of PORESET signal.
HD1
DSISYNC
Input/
Output
Input
Host Data Bus 1
Bit 1 of the DSI data bus.
DSI Synchronous
Distinguishes between synchronous and asynchronous operation of the DSI. It is sampled on
the rising edge of PORESET signal.
HD2
DSI64
Input/
Output
Input
Host Data Bus 2
Bit 2 of the DSI data bus.
DSI 64
Defines the width of the DSI and SYSTEM Data buses. It is sampled on the rising edge of
PORESET signal.
HD3
MODCK1
Input/
Output
Input
Host Data Bus 3
Bit 3 of the DSI data bus.
Clock Mode 1
Defines the clock frequencies. It is sampled on the rising edge of PORESET signal.
Table 3-4. Reset and Configuration Signals (Continued)
Signal Name
Type
Signal Description
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 ...