C8051F996-GUR Silicon Labs, C8051F996-GUR Datasheet - Page 300

• Manufacturer Part Number: C8051F996-GUR
• Description: 8-bit Microcontrollers - MCU 8kB ADC 14-CH CDC
• Manufacturer: Silicon Labs

Specifications of C8051F996-GUR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

C8051F99x-C8051F98x
26.2. PCA0 Interrupt Sources
Figure 26.3 shows a diagram of the PCA interrupt tree. There are five independent event flags that can be
used to generate a PCA0 interrupt. They are: the main PCA counter overflow flag (CF), which is set upon
a 16-bit overflow of the PCA0 counter, an intermediate overflow flag (COVF), which can be set on an
overflow from the 8th, 9th, 10th, or 11th bit of the PCA0 counter, and the individual flags for each PCA
channel (CCF0, CCF1, and CCF2), which are set according to the operation mode of that module. These
event flags are always set when the trigger condition occurs. Each of these flags can be individually
selected to generate a PCA0 interrupt, using the corresponding interrupt enable flag (ECF for CF, ECOV
for COVF, and ECCFn for each CCFn). PCA0 interrupts must be globally enabled before any individual
interrupt sources are recognized by the processor. PCA0 interrupts are globally enabled by setting the EA
bit and the EPCA0 bit to logic 1.
300
PCA Counter/Timer 8, 9,
PCA Counter/Timer 16-
10 or 11-bit Overflow
bit Overflow
P
W
M
1
6
n
PCA Module 0
PCA Module 1
PCA Module 2
(for n = 0 to 2)
PCA0CPMn
E
C
O
M
n
C
A
P
P
n
(CCF0)
(CCF1)
(CCF2)
C
A
P
N
n
M
A
T
n
O
G
T
n
P
W
M
n
E
C
C
F
n
C
F
C
R
PCA0CN
Figure 26.3. PCA Interrupt Block Diagram
C
C
F
2
C
C
F
1
C
C
F
0
ECCF0
ECCF1
ECCF2
C
D
L
I
W
D
T
E
PCA0MD
W
D
C
K
L
C
P
S
2
C
P
S
1
0
1
0
1
0
1
C
P
S
0
E
C
F
0
1
Rev. 1.1
A
R
S
E
L
C
O
PCA0PWM
E
V
O
C
V
F
0
1
C
S
E
L
L
1
C
L
S
E
L
0
Set 8, 9, 10, or 11 bit Operation
EPCA0
0
1
EA
0
1
Interrupt
Priority
Decoder