
Architecture
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
4-3
Many aspects of system configuration are controlled by several SIU module configuration
registers described in Section 4.2.1, System Configuration and Protection Registers.
4.1.1 Bus Monitors
There are two bus monitors, one for the system bus and one for the local bus. The bus monitor
ensures that each bus cycle terminates within a reasonable period. The bus monitor does not
count when the bus is idle. When a transaction starts (
TS
asserted), the bus monitor starts
counting down from the time-out value.
For standard bus transactions with an address tenure and a data tenure, the bus monitor counts
until a data beat is acknowledged on the bus. It then reloads the time-out value and resumes the
count down. This process continues until the whole data tenure is completed. Following the data
tenure, the bus monitor idles if there is no pending transaction; otherwise, it reloads the time-out
value and resumes counting. For address-only transactions, the bus monitor counts until
AACK
is
asserted.
If the monitor times out for a standard bus transaction, transfer error acknowledge (
TEA
) is
asserted. If the monitor times out for an address-only transaction, the bus monitor asserts
AACK
and a core machine check interrupt or reset is generated, depending on SYPCR[SWRI]. Note that
the device does not generate address-only transactions.
To allow variation in system peripheral response times, SYPCR[BMT] defines the time-out
period, whose maximum value can be 2,040 system bus clocks. The timing mechanism is clocked
by the system bus clock divided by eight.
Figure 4-2. System Configuration and Protection Logic
Module
Configuration
Bus
Monitors
Periodic Interrupt
Timer
Software
Watchdog Timer
Time
Counter
Interrupt
Interrupt
System Reset
TIMERSCLK
Bus Clock
TIMERSCLK
System Reset
Bus clock/8
TEA
NMI to Cores
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
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 ...