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參數(shù)資料
型號: W90220F
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: PA-RISC Embedded Micro-Controller(惠普PA-RISC結(jié)構(gòu)的32位嵌入式微控制器)
中文描述: 32-BIT, 150 MHz, RISC PROCESSOR, PQFP208
封裝: PLASTIC, QFP-208
文件頁數(shù): 56/79頁
文件大小: 501K
代理商: W90220F
W90220F
56
The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Version 0.84
Winbond.
0 = Disable Time Out counter
1 = Enable Time Out counter
Bits 1-7 Time Out counter (TOUTcnt[0:6] ) comparsion value
If "TOUTen" is set, the "TOUTcnt[0:6] will be reset first and then start counting whenever
a new PPI transfer cycle is initiated. On detecting TOUTcnt[0:6] is equal to TOUTcmp[1:7],
a "Time Out" flag will be set which in turn trigger a interrupt request (Irpt_TOUT) if IER[2]
(ToutIen) is also set at that time.
The tick of Time-Out Counter is about 9.175ms (OSC/(2**21) where OSC = 14.318Mhz).
The maximum duration that Time-Out Counter can cover is about 1.17 sec (2**7 ticks).
5.2.5 COM PORT INTERFACE REGISTERS
W90220 Provides 2 COM ports to interface external RS232 devices. COM1 allocates 0xf00003f8
~ oxf00003ff as its IO-space, while COM2 allocates 0xf00002f8 ~ 0xf00002ff as its IO-space.
Table 5.2.5-1 : COM1 Register Map
(IO base (BA) : 0xf0000000)
Port Addr.
Symbol
Access
Description
BA + 0x3f8,
DLAB = 0
RBR[0:7]
R
Receiver Buffer Register
BA + 0x3f8,
DLAB = 0
THR[0:7]
W
Transmitter Holding Register
BA + 0x3f9,
DLAB = 1
IER[3:7]
R/W
Interrupt Enable Register
BA + 0x3f8,
DLAB = 1
DLL[0:7]
R/W
Divisor Latch Register (LS)
BA + 0x3f9,
DLAB = 1
DLM[0:7]
R/W
Divisor Latch Register (MS)
BA + 0x3fa
IIR[0:7]
R
Interrupt Identification Register
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