C8051T600QDB Silicon Laboratories Inc, C8051T600QDB Datasheet - Page 87
![BOARD SOCKET DAUGHTER QFN](/photos/9/3/90365/c8051t600qdb_sml.jpg)
C8051T600QDB
Manufacturer Part Number
C8051T600QDB
Description
BOARD SOCKET DAUGHTER QFN
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051T600EDB.pdf
(188 pages)
Specifications of C8051T600QDB
Module/board Type
Socket Module - QFN
Data Bus Width
8 bit
Operating Supply Voltage
+ 1.8 V to + 3.6 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051T600DK
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1406
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17.3. INT0 and INT1 External Interrupt Sources
The INT0 and INT1 external interrupt sources are configurable as active high or low, edge or level sensi-
tive. The IN0PL (INT0 Polarity) and IN1PL (INT1 Polarity) bits in the IT01CF register select active high or
active low; the IT0 and IT1 bits in TCON (Section “25.1. Timer 0 and Timer 1” on page 147) select level or
edge sensitive. The table below lists the possible configurations.
INT0 and INT1 are assigned to Port pins as defined in the IT01CF register (see SFR Definition 17.5). Note
that INT0 and INT0 Port pin assignments are independent of any Crossbar assignments. INT0 and INT1
will monitor their assigned Port pins without disturbing the peripheral that was assigned the Port pin via the
Crossbar. To assign a Port pin only to INT0 and/or INT1, configure the Crossbar to skip the selected pin(s).
This is accomplished by setting the associated bit in register XBR0 (see Section “22.3. Priority Crossbar
Decoder” on page 111 for complete details on configuring the Crossbar).
IE0 (TCON.1) and IE1 (TCON.3) serve as the interrupt-pending flags for the INT0 and INT1 external inter-
rupts, respectively. If an INT0 or INT1 external interrupt is configured as edge-sensitive, the corresponding
interrupt-pending flag is automatically cleared by the hardware when the CPU vectors to the ISR. When
configured as level sensitive, the interrupt-pending flag remains logic 1 while the input is active as defined
by the corresponding polarity bit (IN0PL or IN1PL); the flag remains logic 0 while the input is inactive. The
external interrupt source must hold the input active until the interrupt request is recognized. It must then
deactivate the interrupt request before execution of the ISR completes or another interrupt request will be
generated.
IT0
1
1
0
0
IN0PL
0
1
0
1
Active low, edge sensitive
Active high, edge sensitive
Active low, level sensitive
Active high, level sensitive
/INT0 Interrupt
Rev. 1.2
C8051T600/1/2/3/4/5/6
IT1
1
1
0
0
IN1PL
0
1
0
1
Active high, edge sensitive
Active low, level sensitive
Active high, level sensitive
Active low, edge sensitive
/INT1 Interrupt
87
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