peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 179

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

IC1…0
2.13.4.1
Interrupt outputs of several devices (slaves) are connected to a priority resolving unit
(i.e. interrupt controller). The slave which is selected for the interrupt service routine is
addressed via special address lines during the interrupt acknowledge cycle. For this
application the DOC offers two Interrupt Enable inputs (IE0, IE1) and a programmable
2-bit slave ID (in a DOC register).
Refer to:
Figure 2-49 for interrupt cascading in Siemens/Intel bus mode.
Figure 2-49 Interrupt Cascading (Slave Mode) in Siemens/Intel Bus Mode
Semiconductor Group
µ
P
INTA
INT
Slave Mode
Interrupt Port Configuration
These bits define the function of interrupt output level (pin INT):
Table 2-29
IOC1
0
0
1
1
INT
CAS0...CAS2
8259A
INTA
IR0
IR4
IR5
IR6
IR7
IOC0
0
1
1
0
IACK
DOC
IREQ
2-133
IE0,1
2
Function
Open Drain Output
Push/Pull Output, active low
Push/Pull Output, active high
forbidden
IACK
DOC
IREQ
Functional Block Description
IE0,1
2
IACK
PEB 20560
IREQ
DOC
IE0,1
2003-08
2
ITS10103