C8051F021-GQ Silicon Laboratories Inc, C8051F021-GQ Datasheet - Page 240

IC 8051 MCU 64K FLASH 64TQFP

C8051F021-GQ

Manufacturer Part Number
C8051F021-GQ
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F02xr
Datasheets

Specifications of C8051F021-GQ

Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
64-TQFP, 64-VQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F0x
Core
8051
Data Bus Width
8 bit
Data Ram Size
4.25 KB
Interface Type
I2C/SMBus/SPI/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
32
Number Of Timers
4
Operating Supply Voltage
2.7 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
C8051F020DK
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 8-bit or 8-ch x 12-bit
On-chip Dac
2-ch x 12-bit
No. Of I/o's
32
Ram Memory Size
4352Byte
Cpu Speed
25MHz
No. Of Timers
5
No. Of Pwm Channels
5
Rohs Compliant
Yes
Data Rom Size
64 KB
A/d Bit Size
12 bit
A/d Channels Available
8
Height
1.05 mm
Length
10 mm
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.7 V
Width
10 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1200 - DEV KIT FOR F020/F021/F022/F023
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1201
C8051F020/1/2/3
22.2. Timer 3
Timer 3 is a 16-bit timer formed by the two 8-bit SFRs, TMR3L (low byte) and TMR3H (high byte). Timer 3 may be
clocked by the external oscillator source (divided by eight) or the system clock (divided by either one or twelve as
specified by the Timer 3 Clock Select bit T3M in the Timer 3 Control Register TMR3CN). Timer 3 is always config-
ured as an auto-reload timer, with the reload value held in the TMR3RLL (low byte) and TMR3RLH (high byte) reg-
isters.
The Timer 3 external clock source feature offers a real-time clock (RTC) mode. When bit T3XCLK (TMR3CN.0) is
set to logic 1, Timer 3 is clocked by the external oscillator input (divided by 8) regardless of the system clock selec-
tion. This split clock domain allows Timer 3 to be clocked by a precision external source while the system clock is
derived from the high-speed internal oscillator. When T3XCLK is logic 0, the Timer 3 clock source is specified by bit
T3M (TMR3CN.1).
Timer 3 can also be used to start an ADC Data Conversion, for SMBus timing (see Section
AGEMENT BUS / I2C BUS
ter mode.
240
Oscillator Source
SYSCLK
External
8
12
T3M
0
1
(SMBUS0)” on page 183), or as a general-purpose timer. Timer 3 does not have a coun-
(from SMBus)
Figure 22.19. Timer 3 Block Diagram
SCL
T3XCLK
Crossbar
1
0
TOE
TR3
Rev. 1.4
Reload
TCLK
TMR3RLL TMR3RLH
TMR3L
TMR3H
“18. SYSTEM MAN-
T3XCLK
T3M
TF3
TR3
(to ADC)
Interrupt

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