C8051F902-GU Silicon Laboratories Inc, C8051F902-GU Datasheet - Page 292
![IC MCU 8BIT 8KB FLASH 24QSOP](/photos/12/15/121586/c8051f9xx_24-qsop_sml.jpg)
C8051F902-GU
Manufacturer Part Number
C8051F902-GU
Description
IC MCU 8BIT 8KB FLASH 24QSOP
Manufacturer
Silicon Laboratories Inc
Series
C8051F9xxr
Specifications of C8051F902-GU
Program Memory Type
FLASH
Program Memory Size
8KB (8K x 8)
Package / Case
24-QSOP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
0.9 V ~ 3.6 V
Data Converters
A/D 15x10/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F9x
Core
8051
Data Ram Size
768 B
Interface Type
UART
Maximum Clock Frequency
25 MHz
Number Of Timers
4
Operating Supply Voltage
0.9 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F912DK
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Package
24QSOP
Device Core
8051
Family Name
C8051F90x
Maximum Speed
25 MHz
Data Bus Width
8 Bit
Number Of Programmable I/os
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1849-5
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F902-GU
Manufacturer:
SEMIKRON
Quantity:
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Company:
Part Number:
C8051F902-GU
Manufacturer:
Silicon Laboratories Inc
Quantity:
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C8051F91x-C8051F90x
26. Programmable Counter Array
The Programmable Counter Array (PCA0) provides enhanced timer functionality while requiring less CPU
intervention than the standard 8051 counter/timers. The PCA consists of a dedicated 16-bit counter/timer
and six 16-bit capture/compare modules. Each capture/compare module has its own associated I/O line
(CEXn) which is routed through the Crossbar to Port I/O when enabled. The counter/timer is driven by a
programmable timebase that can select between seven sources: system clock, system clock divided by
four, system clock divided by twelve, the external oscillator clock source divided by 8, SmaRTClock divided
by 8 ('F912 and 'F902 devices only), Timer 0 overflows, or an external clock signal on the ECI input pin.
Each capture/compare module may be configured to operate independently in one of six modes: Edge-
Triggered Capture, Software Timer, High-Speed Output, Frequency Output, 8 to 11-Bit PWM, or 16-Bit
PWM (each mode is described in Section “26.3. Capture/Compare Modules” on page 296). The external
oscillator clock option is ideal for real-time clock (RTC) functionality, allowing the PCA to be clocked by a
precision external oscillator while the internal oscillator drives the system clock. The PCA is configured and
controlled through the system controller's Special Function Registers. The PCA block diagram is shown in
Figure 26.1.
Important Note: The PCA Module 5 may be used as a watchdog timer (WDT), and is enabled in this mode
following a system reset. Access to certain PCA registers is restricted while WDT mode is enabled.
See Section 26.4 for details.
292
Capture/Compare
Module 0
SYSCLK/12
Timer 0 Overflow
SYSCLK
External Clock/8
SmaRTClock/8*
SYSCLK/4
ECI
*Only available on ‘F912 and ‘F902 devices.
Capture/Compare
Module 1
CLOCK
MUX
PCA
Figure 26.1. PCA Block Diagram
16-Bit Counter/Timer
Port I/O
Capture/Compare
Module 2
Crossbar
Rev. 1.0
Capture/Compare
Module 3
Capture/Compare
Module 4
Capture/Compare
Module 5 / WDT
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