peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 196

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

Semiconductor Group
Table 2-36 IIR Register (cont’d)
FIFO
Mode
Only
Bit 3
1
0
0
Bit 2 Bit 1 Bit 0 Priority
1
0
0
Identification
Interrupt
Register
0
1
0
0
0
0
Level
Second
Third
Fourth
Interrupt Set and Reset Functions
2-150
Transmitter
Modem
Interrupt
Type
Character
time-out
indication
holding
register
empty
status
Functional Block Description
Interrupt
Source
No characters
have been
removed from
or input to the
RCVR FIFO
during the last
4 char. times
and there is at
least 1 char.
in it during
this time
Transmitter
holding
register
empty
Clear to send
or data set
ready or ring
indicator or
data carrier
detect
Interrupt
Reset
Control
Reading the
receiver
buffer register
Reading the
IIR register (if
source of
interrupt) or
writing into
the
transmitter
holding
register
Reading the
modem
status
register
PEB 20560
2003-08