C8051T323-GMR Silicon Labs, C8051T323-GMR Datasheet - Page 267
C8051T323-GMR
Manufacturer Part Number
C8051T323-GMR
Description
8-bit Microcontrollers - MCU USB-OTP-16K-QFN28
Manufacturer
Silicon Labs
Datasheet
1.C8051T322-GQR.pdf
(292 pages)
Specifications of C8051T323-GMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
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Note: The CEXn input signal must remain high or low for at least 2 system clock cycles to be recognized by the
29.3.2. Software Timer (Compare) Mode
In Software Timer mode, the PCA counter/timer value is compared to the module's 16-bit capture/compare
register (PCA0CPHn and PCA0CPLn). When a match occurs, the Capture/Compare Flag (CCFn) in
PCA0CN is set to logic 1. An interrupt request is generated if the CCFn interrupt for that module is
enabled. The CCFn bit is not automatically cleared by hardware when the CPU vectors to the interrupt ser-
vice routine, and must be cleared by software. Setting the ECOMn and MATn bits in the PCA0CPMn regis-
ter enables Software Timer mode.
Important Note About Capture/Compare Registers : When writing a 16-bit value to the PCA0 Cap-
ture/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.
Port I/O
hardware.
Crossbar
CEXn
Figure 29.4. PCA Capture Mode Diagram
C8051T620/621/320/321/322/323
W
M
P
1
6
n
x
PCA0CPMn
E
C
O
M
n
x
C
A
P
P
n
Rev. 1.1
C
A
P
N
n
0
1
M
A
T
n
0 0 0 x
O
G
T
n
W
P
M
n
E
C
C
F
n
0
1
C
F
C
R
PCA0CN
C
C
F
4
C
C
F
3
PCA
Timebase
C
C
F
2
C
C
F
1
C
C
F
0
PCA Interrupt
Capture
PCA0CPLn
PCA0L
PCA0CPHn
PCA0H
267
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