參數(shù)資料
型號(hào): 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): 43/111頁
文件大?。?/td> 671K
代理商: GT-64010A
GT-64010A System Controller with PCI Interface for R4XXX/R5000 Family CPUs
37
Rev is io n 1. 1
Galileo
TechnologyTM
5.12 Timer / Counter
There are three 24-bit wide and one 32-bit wide timers/counters on the GT-64010A. Each one can be selected to oper-
ate as a timer or as a counter. In Counter mode, the counter will count down to terminal count, will stop and issue an
interrupt. In Timer mode, it will count down, will issue an interrupt on terminal count, and will reload itself to the pro-
grammed value and continue to count. Reads from the counter or timer are done from the counter itself, while writes
are to its register. For example, note that even though the registers are programmed to an initial value of ‘0’ the
counters will read 0xffffff. In order to reprogram a timer/counter, it should first be disabled, then it should be loaded with
a new value and after that it should be enabled as appropriate (counter or timer).
T i m er/ Co u n t er 0, O f f set : 0x85 0
T i m er/ Co u n t er 1, O f f set : 0x85 4
T i m er/ Co u n t er 2, O f f set : 0x85 8
T i m er/ Co u n t er 3, O f f set : 0x85 c
Bits
Field Name
Function
Initial Value
31:0
TC0Value
The counter or timer initial value.
0x0
Bits
Field Name
Function
Initial Value
23:0
TC1Value
The counter or timer initial value.
0x0
Bits
Field Name
Function
Initial Value
23:0
TC2Value
The counter or timer initial value.
0x0
Bits
Field Name
Function
Initial Value
23:0
TC3Value
The counter or timer initial value.
0x0
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