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參數資料
型號: W90221F
廠商: WINBOND ELECTRONICS CORP
英文描述: PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器)
中文描述: PA - RISC的嵌入式微控制器(惠普的PA - RISC結構的32位嵌入式微控制器)
文件頁數: 132/174頁
文件大小: 2102K
代理商: W90221F
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The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed, distributed or reproduced without permission from Winbond.
132
Versi on 0. 4, March/2000
6.9 TIMER REGISTERS
There are four registers included in the Timer. The IO address map is allocated from 0xf0000040 to
0xf0000043.
Table 6.9-1 Timer Register Map
(IO base (BA) : 0xf0000000)
Port Addr.
Symbol
Access
Description
BA + 0x40
TCR1
R/W
Timer Control Register 1
BA + 0x41
TICR1
R/W
Timer Initial Control Register 1
BA + 0x42
TCR2
R/W
Timer Control Register 2
BA + 0x43
TICR2
R/W
Timer Initial Control Register 2
Timer Control Register1 (TCR1)
Port address : 0x00000040
Read/Write
Power-on Default : --
0
1
2
3 24
23
31
TI
CE
IE
Reserved
Pre-scale
Bit 0 Timer interrupt bit : The timer sets this bit to one to indicate that it has decremented to
zero. this bit remain one until software sets it to zero.
Bit1 Counter Enable bit : Setting the CE bit to one causes the timer to begin decrementing
Setting the CE bit to zero stops the timer.
Bit2 Interrupt Enable bit : When IE is set to one and the counter decrements to zero,
the timer asserts its interrupt signal to interrupt CPU.
Bit24_31 Pre-Scalar : A pre-scalar value can be used to divide the input clock.
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