參數(shù)資料
型號: NS32490D
廠商: National Semiconductor Corporation
英文描述: NIC Network Interface Controller(NIC網(wǎng)絡(luò)接口控制器)
中文描述: NIC網(wǎng)絡(luò)接口控制器(NIC網(wǎng)絡(luò)接口控制器)
文件頁數(shù): 21/56頁
文件大?。?/td> 689K
代理商: NS32490D
10.0 Internal Registers
(Continued)
10.3 Register Descriptions
(Continued)
INTERRUPT MASK REGISTER (IMR)
0FH (WRITE)
The Interrupt Mask Register is used to mask interrupts. Each interrupt mask bit corresponds to a bit in the Interrupt Status
Register (ISR). If an interrupt mask bit is set an interrupt will be issued whenever the corresponding bit in the ISR is set. If any bit
in the IMR is set low, an interrupt will not occur when the bit in the ISR is set.
The IMR powers up all zeroes.
7
6
5
4
3
2
1
0
D
RDCE CNTE OVWE TXEE RXEE PTXE PRXE
Bit
Symbol
Description
D0
PRXE
PACKET RECEIVED INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when packet received.
D1
PTXE
PACKET TRANSMITTED INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when packet is transmitted.
D2
RXEE
RECEIVE ERROR INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when packet received with error.
D3
TXEE
TRANSMIT ERROR INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when packet transmission results in error.
D4
OVWE
OVERWRITE WARNING INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when Buffer Management Logic lacks sufficient buffers to
store incoming packet.
D5
CNTE
COUNTER OVERFLOW INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when MSB of one or more of the Network Statistics
counters has been set.
D6
RDCE
DMA COMPLETE INTERRUPT ENABLE
0: Interrupt Disabled
1: Enables Interrupt when Remote DMA transfer has been completed.
D7
reserved
reserved
21
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