MSC8113 Reference Manual, Rev. 0
13-22
Freescale Semiconductor
System Bus
13.2.3.3 Address Transfer Attribute Signals
During the address transfer, the address is placed on the address signals,
A[0–31]
. The bus master
provides the following signals that characterize the address transfer: transfer type (
TT[0–4]
),
transfer code (
TC[0–2]
), transfer size (
TSIZ[0–3]
), and transfer burst (
TBST
) signals. These signals
are discussed in the following sections.
Transfer type signals (
TT[0–4]
). The transfer type signals define the nature of the transfer
requested (Read or Write). Table 13-10 describes the MSC8113 action as master, slave,
and snooper.
Transfer Code signals (
TC[0–2])
. The transfer code signals give supplemental information
about the corresponding address, mainly the source of the transaction, as listed in Table
13-11.
Note:
The
TCx
signals can be used with the
TT[0–4]
and
TBST
signals to further define the
current transaction.
Table 13-10. Transfer Type Encoding
TT[0–4]
1,2
60x Bus Specification
3
MSC8113 as Bus Master
MSC8113 as
Snooper
MSC8113 as Slave
Command
Transaction
Bus
Transaction
Transaction
Source
Action on Hit
Action on Slave Hit
00010
Write Single-beat
or
burst write
Single-beat or
burst write
Master
Cancel
reservation
Write, assert AACK and
TA
01010
Read
Single-beat or
burst read
Single-beat or
burst read
Master
Not
applicable to
MSC8113
Read, assert AACK and
TA
else Reserved
—
Not
applicable to
MSC8113
Not
applicable to
MSC8113
Not
applicable to
MSC8113
Illegal
Notes: 1.
TT1 can be interpreted as a read-versus-write indicator for the bus.
2.
The MSC8113 can use a reduced mode in which only TT1 is an external signal. This mode is used in
configurations with all external masters supporting TT1 only mode. The MSC8113 builds the complete transfer
type internally.
3.
This column specifies the TT encoding for the general 60x protocol. The processor generates or snoops only a
subset of those encodings.
Table 13-11. Transfer Code Encoding
TC[0–2]
System Bus
Local Bus
000
Reserved
System-Local bus bridge
001
DSI
DSI
010
Reserved
TDM
011
Ethernet Controller
Ethernet Controller
100
Reserved
Reserved
101
SC140 cores
Reserved
Содержание MSC8113
Страница 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Страница 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Страница 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Страница 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Страница 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Страница 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Страница 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Страница 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Страница 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Страница 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Страница 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Страница 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Страница 544: ...MSC8113 Reference Manual Rev 0 16 46 Freescale Semiconductor Direct Memory Access DMA Controller ...
Страница 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Страница 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Страница 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Страница 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Страница 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Страница 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Страница 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Страница 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...