PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 106

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
The table below summarizes, how the COUNT field itself, the interrupt requests flag IR
and the PEC channel action depends on the previous content of COUNT.
•
Previous
COUNT
FF
FE
01
00
The PEC transfer counter allows to service a specified number of requests by the
respective PEC channel, and then (when COUNT reaches 00
service routine, which is associated with the priority level. After each PEC transfer the
COUNT field is decremented and the request flag is cleared to indicate that the request
has been serviced.
Continuous transfers are selected by the value FF
COUNT is not modified and the respective PEC channel services any request until it is
disabled again.
When COUNT is decremented from 01
cleared, which generates another request from the same source. When COUNT already
contains the value 00
interrupt service routine is activated instead. This allows to choose, if a level 15 or 14
request is to be serviced by the PEC or by the interrupt service routine.
Note: PEC transfers are only executed, if their priority level is higher than the CPU level,
The source and destination pointers specifiy the locations between which the data is
to be moved. A pair of pointers (SRCPx and DSTPx) is associated with each of the 8
PEC channels. These pointers do not reside in specific SFRs, but are mapped into the
internal RAM of the INCA-D just below the bit-addressable area (see figure below).
H
H
H
H
..02
ie. only PEC channels 7...4 are processed, while the CPU executes on level 14.
All interrupt request sources that are enabled and programmed for PEC service
should use different channels. Otherwise only one transfer will be performed for
all simultaneous requests. When COUNT is decremented to 00
to be interrupted, an incorrect interrupt vector will be generated.
H
Modified
COUNT
FF
FD
00
00
H
H
H
H
..01
H
IR after PEC
service
‘0’
‘0’
‘1’
(‘1’)
H
, the respective PEC channel remains idle and the associated
Action of PEC Channel
and Comments
Move a Byte / Word
Continuous transfer mode, ie. COUNT is not modified
Move a Byte / Word and decrement COUNT
Move a Byte / Word
Leave request flag set, which triggers another request
No action!
Activate interrupt service routine rather than PEC channel.
H
to 00
106
H
after a transfer, the request flag is not
H
in bit field COUNT. In this case
H
) activate the interrupt
H
, and the CPU is
PSB 21473
Interrupts
2003-03-31
INCA-D