C8051F537-IT Silicon Laboratories Inc, C8051F537-IT Datasheet - Page 199

• 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

19.2.3. High Speed Output Mode
In High Speed Output mode, a module’s associated CEXn pin is toggled each time a match occurs
between the PCA Counter and the module's 16-bit capture/compare register (PCA0CPHn and
PCA0CPLn) Setting the TOGn, MATn, and ECOMn bits in the PCA0CPMn register enables the High-
Speed Output 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.
Note: The initial state of the Toggle output is logic 1 and is initialized to this state when the module enters High Speed
Output Mode.
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
Figure 19.6. PCA High-Speed Output Mode Diagram
ENB
ENB
1
PCA
Timebase
Enable
W
P
M
1
6
n
x
E
C
O
M
PCA0CPLn
n
PCA0CPMn
C
A
P
P
n
0 0
PCA0L
C
N
A
P
n
16-bit Comparator
M
A
T
n
O
G
T
n
W
C8051F52x/F52xA/F53x/F53xA
P
M
n
0 x
E
C
C
F
n
PCA0CPHn
PCA0H
Rev. 1.3
Match
Toggle
C
F
C
R
TOGn
0
1
PCA0CN
0
1
CEXn
C
C
F
2
PCA
Interrupt
C
C
F
1
C
C
F
0
Crossbar
Port I/O
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