參數(shù)資料
型號: LR4500
廠商: LSI Corporation
英文描述: Superscalar Microprocessor(超標量微處理器)
中文描述: 超標量微處理器(超標量微處理器)
文件頁數(shù): 139/172頁
文件大?。?/td> 1142K
代理商: LR4500
ICEport Signals
9-7
SCAop[31:0]
SCbus Address Bus
SCAop[31:0] is the address bus. The ICEport monitors
this bus and SCTSSn for data read/write operations
involving the ICEport. When an SCbus transaction
involves the ICEport, the ICEport decodes SCAop[31:0]
to decide which internal register the transaction targets.
Input
SCDoEn
SCbus Data Output Enable
The value of SCDoEn determines whether the present
SCbus transaction is a write or a read transaction. If it is
a write, SCDoEn is driven LOW; if it is a read, SCDoEn
is driven HIGH. The ICEport monitors SCDoEn so that it
may perform the correct action for either a read or a write
transaction.
Input
SCTSSn
SCbus Transaction Start Signal
The core asserts SCTSSn for one clock cycle at the
beginning of a transaction to announce that a new
transaction has begun. Asserting SCTSSn when address
SCAop[31:2] is valid initiates an ICEport read/write
operation.
Input
WRESETn
Warm Reset
When the core asserts WRESETn, it resets the ICEport
and all ICEport registers. CRESETn and WRESETn are
internally merged in the ICEport.
Input
9.4.2 Other SCbus Signals
The signals described in this section enable ICEport read and write
operations and transfer data for these operations.
sc_ICEDip[7:0]
SCbus Input Data Bus
This is the SCbus input data bus. For write operations to
the ICEport, data is transferred to the ICEport through
this bus. On the positive edge of the same SCLKp that
asserts sc_ICERDYp, the core writes data into the
ICEport.
Input
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