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參數資料
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結構的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: 51/79頁
文件大小: 501K
代理商: W90220F
W90220F
51
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.
Bits 0
DMA mode enable
A low-to-high transition of this bit will make PPI issue a DREQ to DMA controller.
On receiving the corresponding DACK, PPI deasserts the DREQ.
This bit will be cleared by DMA terminal-count (TC) asserting or by a CPU write
cycle with data-in[0] = 0.
Bit 1
Reset Dfifo
Writing a logical one to this bit will assert "Dfifo Reset" for one EXTCLK cycle.
This bit will return to deasserted state automatically after "Dfifo Reset" is issued.
Bit 2
Reset Device
Writing a logical one to this bit will assert "Device Reset" for one EXTCLK cycle.
This bit will return to deasserted state automatically after "Device Reset" is issued.
Bit 3
PWord size
0 = PWord is 8 bits (1 byte)
1 = PWord is 32 bits (4 bytes)
"PWord" defines the basic unit of Dfifo access during CPU cycle.
Bit 4-5 Device mode select
IER[1] and FCR[4:5] are used to choose device operation mode.
{IER[1], FCR[4:5]}
Device Operation Mode
1 x 0
1 x 1
0 0 0
0 0 1
0 1 0
0 1 1
Test Mode
Peripheral Emulation Mode
Standard Mode
PS2 Mode
Fast Standard Mode
ECP Mode
Bit 6-7 Dfifo Read Threshold
These two bits define the threshold level for triggering data-available interrupt (Irpt_RDA)
of Dfifo during reverse transfering.
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