C8051F060_07 SILABS [Silicon Laboratories], C8051F060_07 Datasheet - Page 307
C8051F060_07
Manufacturer Part Number
C8051F060_07
Description
Mixed Signal ISP Flash MCU Family
Manufacturer
SILABS [Silicon Laboratories]
Datasheet
1.C8051F060_07.pdf
(328 pages)
- Current page: 307 of 328
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25.2.2. Software Timer (Compare) Mode
In Software Timer mode, the PCA0 counter/timer is compared to the module's 16-bit capture/compare reg-
ister (PCA0CPHn and PCA0CPLn). When a match occurs, the Capture/Compare Flag (CCFn) in PCA0CN
is set to logic 1 and an interrupt request is generated if CCF interrupts are enabled. The CCFn bit is not
automatically cleared by hardware when the CPU vectors to the interrupt service routine, and must be
cleared by software. Setting the ECOMn and MATn bits in the PCA0CPMn register enables Software
Timer mode.
Important Note About Capture/Compare Registers: When writing a 16-bit value to the PCA0 Capture/
Compare registers, the low byte should always be written first. Writing to PCA0CPLn clears the ECOMn bit
to ‘0’; writing to PCA0CPHn sets ECOMn to ‘1’.
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
1
ENB
ENB
W
M
P
1
6
n
x
E
C
O
M
Figure 25.5. PCA Software Timer Mode Diagram
n
PCA0CPMn
C
A
P
P
n
0 0
C
N
A
P
n
M
A
T
n
O
G
T
n
0 0
W
M
P
n
E
C
C
F
n
x
Enable
PCA
Timebase
Rev. 1.2
PCA0CPLn
PCA0L
16-bit Comparator
C8051F060/1/2/3/4/5/6/7
PCA0CPHn
PCA0H
Match
C
F
C
R
0
1
PCA0CN
C
C
F
5
C
C
F
4
C
C
F
3
C
C
F
2
PCA
Interrupt
C
C
F
1
C
C
F
0
307
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