C8051F537-IT Silicon Laboratories Inc, C8051F537-IT Datasheet - Page 196

• Manufacturer Part Number: C8051F537-IT
• Description: IC 8051 MCU 2K FLASH 20TSSOP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F53xr

Specifications of C8051F537-IT

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.25 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 336-1401

C8051F52x/F52xA/F53x/F53xA
19.2. Capture/Compare Modules
Each module can be configured to operate independently in one of six operation modes: Edge-triggered
Capture, Software Timer, High Speed Output, Frequency Output, 8-Bit Pulse Width Modulator, or 16-Bit
Pulse Width Modulator. Each module has Special Function Registers (SFRs) associated with it in the CIP-
51 system controller. These registers are used to exchange data with a module and configure the module's
mode of operation.
Table 19.2 summarizes the bit settings in the PCA0CPMn registers used to select the PCA capture/com-
pare module’s operating modes. Setting the ECCFn bit in a PCA0CPMn register enables the module's
CCFn interrupt. Note that PCA0 interrupts must be globally enabled before individual CCFn interrupts are
recognized. PCA0 interrupts are globally enabled by setting the EA bit and the EPCA0 bit to logic 1. See
Figure 19.3 for details on the PCA interrupt configuration.
Table 19.2. PCA0CPM Register Settings for PCA Capture/Compare Modules
196
PWM16 ECOM CAPP CAPN
X = Don’t Care
X
X
X
X
X
X
0
1
Timer Overflow
PCA Counter/
W
M
P
1
6
n
PCA Module 0
PCA Module 1
PCA Module 2
(for n = 0 to 5)
PCA0CPMn
C
O
M
E
n
C
A
P
P
n
(CCF0)
(CCF1)
(CCF2)
X
X
X
1
1
1
1
1
C
A
P
N
n
M
A
T
n
T
O
G
n
W
M
P
n
E
C
C
F
n
C
F
1
0
1
0
0
0
0
0
C
R
PCA0CN
C
C
F
2
C
C
F
1
Figure 19.3. PCA Interrupt Block Diagram
C
C
F
0
0
1
1
0
0
0
0
0
ECCF0
ECCF1
ECCF2
C
D
L
I
PCA0MD
MAT
C
P
S
2
X
X
X
0
0
0
1
1
C
P
S
1
0
1
0
1
0
1
C
P
S
0
E
C
F
0
1
TOG
0
0
0
0
1
1
0
0
Rev. 1.3
PWM ECCF
0
0
0
0
0
1
1
1
X
X
X
X
X
X
X
X
Capture triggered by positive edge on
CEXn
Capture triggered by negative edge on
CEXn
Capture triggered by transition on
CEXn
Software Timer
High Speed Output
Frequency Output
8-Bit Pulse Width Modulator
16-Bit Pulse Width Modulator
(EIE1.4)
EPCA0
Operation Mode
0
1
(IE.7)
EA
0
1
Interrupt
Priority
Decoder