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Direct Slave Interface, System Bus, Ethernet, and Interrupt Signals
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
3-15
TA
Input/
Output
Transfer Acknowledge
Indicates that a data beat is valid on the data bus. For single-beat transfers, TA assertion
indicates the termination of the transfer. For burst transfers, TA is asserted eight times to
indicate the transfer of eight data beats, with the last assertion indicating the termination of
the burst transfer.
TEA
Input/
Output
Transfer Error Acknowledge
Assertion indicates a failure of the data tenure transaction.The masters within the MSC8113
monitor the state of this pin. The MSC8113 internal bus monitor can assert this pin if it
identifies a bus transfer that does not complete.
NMI
Input
Non-Maskable Interrupt
When an external device asserts this line, it generates an non-maskable interrupt in the
MSC8113, which is processed internally (default) or is directed to an external host for
processing (see NMI_OUT).
NMI_OUT
Output
Non-Maskable Interrupt Output
An open-drain pin driven from the MSC8113 internal interrupt controller. Assertion of this
output indicates that a non-maskable interrupt is pending in the MSC8113 internal interrupt
controller, waiting to be handled by an external host.
PSDVAL
Input/
Output
Port Size Data Valid
Indicates that a data beat is valid on the data bus. The difference between the TA pin and the
PSDVAL pin is that the TA pin is asserted to indicate data transfer terminations, while the
PSDVAL signal is asserted with each data beat movement. When TA is asserted, PSDVAL is
always asserted. However, when PSDVAL is asserted, TA is not necessarily asserted. For
example, if the DMA initiates a double word (2
×
64 bits) transaction to a memory device with
a 32-bit port size, PSDVAL is asserted three times without TA and, finally, both pins are
asserted to terminate the transfer.
IRQ7
INT_OUT
Input
Output
Interrupt Request 7
One of fifteen external lines that can request a service routine, via the internal interrupt
controller, from the SC140.
Interrupt Output
Assertion of this output indicates that an unmasked interrupt is pending in the MSC8113
internal interrupt controller.
Notes: 1.
See the System Interface Unit (SIU) chapter in the MSC8113 Reference Manual for details on how to configure
these pins.
2.
When used as the bus control arbiter, the MSC8113 can support up to three external bus masters. Each master
uses its own set of Bus Request, Bus Grant, and Data Bus Grant signals (BR/BG/DBG,
EXT_BR2/EXT_BG2/EXT_DBG2, and EXT_BR3/EXT_BG3/EXT_DBG3). Each of these signal sets must be
configured to indicate whether the external master is or is not a MSC8113 master device. See the Bus
Configuration Register (BCR) description in the System Interface Unit (SIU) chapter in the MSC8113 Reference
Manual for details on how to configure these pins. The second and third set of pins is defined by EXT_xxx to
indicate that they can only be used with external master devices. The first set of pins (BR/BG/DBG) have a dual
function. When the MSC8113 is not the bus arbiter, it uses these signals (BR/BG/DBG) to obtain master control
of the bus.
Table 3-5. DSI, System Bus, Ethernet, and Interrupt Signals (Continued)
Signal Name
Type
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 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
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 ...