参数资料
型号: S5N8947
厂商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: MCU for ADSL/Cable Modem
中文描述: 单片机为ADSL / Cable Modem的
文件页数: 33/49页
文件大小: 407K
代理商: S5N8947
ELECTRONICS
S5N8947 (ADSL/Cable Modem MCU)
SAMSUNG ELECTRONICS
Page : 33
MagIC Team
6.11. Interrupt Controller
The S5N8947 interrupt controller has a total of 18 interrupt sources. Interrupt requests can be generated
by internal function blocks and external pins.
The ARM7TDMI core recongnizes two kinds of interrupts: a normal interrupt request (IRQ), and a fast
interrupt request (FIQ). Therefore all S5N8947 interrupts can be categorized as either IRQ or FIQ. The
S5N8947 interrupt controller has an interrupt pending bit for each interrupt source.
Four special registers are used to control interrupt generation and handling:
l
Interrupt priority registers. The index number of each interrupt source is written to the pre-defined
interrupt priority register field to obtain that priority. The interrupt priorities are pre-defined from 0 to
17.
l
Interrupt mode register. Defines the interrupt mode, IRQ or FIQ, for each interrupt source.
l
Interrupt pending register. Indicates that an interrupt request is pending. If the pending bit is set, the
interrupt pending status is maintained until the CPU clears it by writing a "1" to the appropriate
pending register. When the pending bit is set, the interrupt service routine starts whenever the
interrupt mask register is "0". The service routine must clear the pending condition by writing a "1" to
the appropriate pending bit. This avoids the possibility of continuous interrupt requests from the same
interrupt pending bit.
l
Interrupt mask register. Indicates that the current interrupt has been disabled if the corresponding
mask bit is "1". If an interrupt mask bit is "0" the interrupt will be serviced normally. If the global
mask bit (bit 18) is set to "1", no interrupts are serviced. However, the source's pending bit is set if the
interrupt is generated. When the global mask bit has been set to "0", the interrupt is serviced.
Index Values
[17]
[16]
[15]
[14]
[13]
[12]
[11]
[10]
[9]
[8]
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
Interrupt Sources
I
2
C-bus interrupt
Ethernet controller MAC Rx interrupt
Ethernet controller MAC Tx interrupt
Ethernet controller BDMA Rx interrupt
Ethernet controller BDMA Tx interrupt
SAR Tx/Rx done interrupt
SAR Tx/Rx error interrupt
USB interrupt
GDMA channel 1 interrupt
GDMA channel 0 interrupt
Timer 1 interrupt
Timer 0 interrupt
UART receive and error interrupt
UART transmit interrupt
External interrupt 3
External interrupt 2
External interrupt 1
External interrupt 0
Table 3 S5N8947 Interrupt Sources
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S5N8947X 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:MCU for ADSL/Cable Modem
S5N8950 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:G.dmt ADSL Transceiver for CO and CPE
S5N8951 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:G.dmt ADSL Analog Front End IC
S5N8951X 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:G.dmt ADSL Analog Front End IC
S5N8952 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:ADSL Transceiver for NIC