參數(shù)資料
型號(hào)： PSB3186
英文描述： The IRAC1150-D2 Control Board is designed to demonstrate the performance of the IR1150S control IC in a continuous conduction mode boost converter for PFC.; A IRAC1150-D2 with Standard Packaging
中文描述： 3.3伏ISDN用戶終端訪問控制器eXtended擴(kuò)展
文件頁(yè)數(shù)： 33/200頁(yè)
文件大?。?/td> 2959K
代理商： PSB3186
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ISAC-SX TE
PSB 3186
Description of Functional Blocks
Data Sheet
33
2003-01-30
3.2.3
Special events in the device are indicated by means of a single interrupt output, which
requests the host to read status information from the device or transfer data from/to the
device.
Since only one interrupt request pin (INT) is provided, the cause of an interrupt must be
determined by the host reading the interrupt status registers of the device.
The structure of the interrupt status registers is shown in
Figure 8
.
Interrupt Structure
Figure 8
Interrupt Status and Mask Registers
All six interrupt bits in the ISTA register point at interrupt sources in the D-channel HDLC
Controller (ICD), Monitor- (MOS) and C/I- (CIC) handler, the transceiver (TRAN), the
synchronous transfer (ST) and the auxiliary interrupts (AUXI).
All these interrupt sources are described in the corresponding chapters. After the device
has requested an interrupt activating the interrupt pin (INT), the host must read first the
device interrupt status register (ISTA) in the associated interrupt service routine. The
interrupt pin of the device remains active until all interrupt sources are cleared by reading
the corresponding interrupt register. Therefore it is possible that the interrupt pin is still
active when the interrupt service routine is finished.
Each interrupt indication of the interrupt status registers can selectively be masked by
setting the respective bit in the MASK register.
For some interrupt controllers or hosts it might be necessary to generate a new edge on
the interrupt line to recognize pending interrupts. This can be done by masking all
interrupts at the end of the interrupt service routine (writing FF
H
into the MASK register)
and write back the old mask to the MASK register.
ICD
MOS
TRAN
AUX
CIC
ST
ICD
MOS
TRAN
AUX
CIC
ST
STI10
STI11
STI20
STI21
STOV10
STOV11
STOV20
STOV21
STI10
STI11
STI20
STI21
STOV10
STOV11
STOV20
STOV21
STI
ACK10
ACK11
ACK20
ACK21
ASTI
MSTI
CI1E
CIC1
CIC0
CIR0
CIX1
XDU
MASKD
XMR
XPR
RFO
RPF
RME
XDU
ISTAD
XMR
XPR
RFO
RPF
RME
MIE
MRE
MAB
MOSR
MDA
MER
MDR
SQW
MASKTR
SQC
RIC
LD
ISTATR
SQW
SQC
RIC
LD
MASK
ISTA
3186_16.vsd
Interrupt
MOCR
TIN1
TIN2
WOV
AUXM
AUXI
TIN1
TIN2
WOV
EAW
EAW
D-channel
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