C8051F804-GS Silicon Laboratories Inc, C8051F804-GS Datasheet - Page 231

• Manufacturer Part Number: C8051F804-GS
• Description: IC MCU 8BIT 16KB FLASH 16SOIC
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F80xr

Specifications of C8051F804-GS

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Cap Sense, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (3.9mm Width)
• Processor Series: C8051F8x
• Core: 8051
• Data Bus Width: 16 bit
• Data Ram Size: 512 B
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 13
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F800DK
• Minimum Operating Temperature: - 55 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 336-1773-5

29.3.3. 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). When a
match occurs, the Capture/Compare Flag (CCFn) in PCA0CN is set to logic 1. An interrupt request is gen-
erated if the CCFn interrupt for that module is enabled. The CCFn bit is not automatically cleared by hard-
ware when the CPU vectors to the interrupt service routine, and must be cleared by software. Setting the
TOGn, MATn, and ECOMn bits in the PCA0CPMn register enables the high-speed output mode. If ECOMn
is cleared, the associated pin will retain its state, and not toggle on the next match event.
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.
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
ENB
ENB
1
PCA
Timebase
Figure 29.6. PCA High-Speed Output Mode Diagram
Enable
P
W
M
1
6
n
x
C
O
M
E
n
PCA0CPLn
PCA0CPMn
C
A
P
P
n
0 0
PCA0L
C
A
P
N
n
16-bit Comparator
M
A
T
n
O
G
T
n
W
M
P
n
0 x
E
C
C
F
n
PCA0CPHn
PCA0H
Rev. 1.0
Match
Toggle
C
F
C
R
TOGn
0
1
PCA0CN
C8051F80x-83x
0
1
CEXn
C
C
F
2
C
C
F
1
C
C
F
0
PCA Interrupt
Crossbar
Port I/O
231