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參數資料
型號: W6690
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Controller(ISDN S/T接口控制器)
中文描述: 綜合業務數字網的S / T接口控制器(綜合業務數字網S / T的接口控制器)
文件頁數: 65/76頁
文件大小: 471K
代理商: W6690
Preliminary W6690
Publication Release Date: March 1998
- 65 -
Revision A1
8.4.17 Interrupt Request Type IRQ_T Read
Address 71H
Value after reset: 02H
7
6
5
4
3
2
1
0
X
X
X
X
X
X
HIGH
LEV
Bit 7
2 Don't care
HIGH Interrupt High Active
0: The interrupt is LOW active.
1: The interrupt is HIGH active.
LEV Interrupt Level Triggered
0: The interrupt is edge triggered.
1: The interrupt is level triggered.
Notes:
1. This register is read only. Only the edge triggered, HIGH active type is implemented.
2. An edge triggered, HIGH active interrupt must be programmed for ISA compatibility. This means that a valid interrupt
generates a LOW to HIGH transition on the interrupt request line.
Remarks about Plug and Play ISA Specification:
According to "Plug and Play ISA Specification", the following requirements must be obeyed :
1. Any unimplemented memory configuration registers must return "zero" on read.
2. Any unimplemented I/O configuration registers must return "zero" on read.
3. Any unimplemented interrupt configuration registers must return "zero" on read.
4. Any unimplemented DMA configuration registers must return "four" on read.
9. ELECTRICAL CHARACTERISTICS
9.1 Absolute Maximum Rating
PARAMETER
SYMBOL
LIMIT VALUES
UNIT
Voltage on Any Pin with Respect to Ground
V
S
-0.4 to V
DD
+0.4
V
Ambient Temperature Under Bias
T
A
0 to 70
°
C
V
Maximum Voltage on V
DD
V
DD
6
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