參數(shù)資料
型號: GT-64010A
廠商: Galileo Technology Services, LLC
英文描述: System Controller with PCI Interface for R4XXX/ R5000 Family CPUs(帶PCI接口用于R4XXX/ R5000 系列 CPUs的系統(tǒng)控制器)
中文描述: 系統(tǒng)控制器的PCI R4XXX接口/ R5000系列處理器(帶的PCI接口用于R4XXX / R5000系列處理器的系統(tǒng)控制器)
文件頁數(shù): 45/111頁
文件大小: 671K
代理商: GT-64010A
GT-64010A System Controller with PCI Interface for R4XXX/R5000 Family CPUs
39
Rev is io n 1. 1
Galileo
TechnologyTM
C o m man d , O f f set : 0xc0 0
T i m e O u t & Re t ry, O f f set : 0x c04
Bits
Field name
Function
Initial Value
0
ByteSwap
When set to zero, the GT-64010A swaps the incoming
and outgoing PCI data.
Set to the same value
sampled at reset into
bit[12] of the CPU
Interface Configura-
tion register.
2:1
SyncMode
Indicates the ratio between TClk and PClk as follows:
00 - When the PClk ranges from DC to 33MHz
(default mode, works in all cases; use following set-
tings for higher performance)
01 - When PClk is HIGHER than half the TClk fre-
quency (e.g. when TClk is 50MHz, SyncMode can be
set to 01 if the PCI frequency is HIGHER than 25
MHz).
1x - When the two clocks are synchronized (e.g. TClk
= 50MHz, PClk = 25MHz)
0x0
Bits
Field name
Function
Initial Value
7:0
Timeout0
Specifies in PCI clock units the number of clocks the
GT-64010A, as a slave, holds the PCI bus before the
generation of retry termination. Used for the first data
transfer.
0x0f
15:8
Timeout1
Specifies in PCI clock units the number of clocks the
GT-64010A, as a slave, holds the PCI bus before the
generation of disconnect termination. Used for data
transfers following the first data.The number of PCI
clock cycles between the last Trdy* rise and the Stop*
falling are n+1, where ‘n’ is the Timeout1 value.
0x07
23:16
RetryCtr
Specifies the number of retries of the GT-64010A
Master. The GT-64010A generates an interrupt when
this timer expires. A value of 0x00 means “retry for-
ever”. The number in RetryCtr does not include the
first access of the transaction.
0x00
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