C8051F021-GQ Silicon Laboratories Inc, C8051F021-GQ Datasheet - Page 244

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

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C8051F020/1/2/3
22.3.1. Mode 0: 16-bit Counter/Timer with Capture
In this mode, Timer 4 operates as a 16-bit counter/timer with capture facility. A high-to-low transition on the T4EX
input pin causes the following to occur:
Timer 4 can use either SYSCLK, SYSCLK divided by 12, or high-to-low transitions on the T4 input pin as its clock
source when operating in Capture mode. Clearing the C/T4 bit (T4CON.1) selects the system clock as the input for
the timer (divided by one or twelve as specified by the Timer Clock Select bit T4M in CKCON). When C/T4 is set to
logic 1, a high-to-low transition at the T4 input pin increments the counter/timer register. As the 16-bit counter/timer
register increments and overflows from 0xFFFF to 0x0000, the TF4 timer overflow flag (T4CON.7) is set and an
interrupt will occur if the interrupt is enabled.
Counter/Timer with Capture mode is selected by setting the Capture/Reload Select bit CP/RL4 (T4CON.0) and the
Timer 4 Run Control bit TR4 (T4CON.2) to logic 1. The Timer 4 External Enable EXEN4 (T4CON.3) must also be
set to logic 1 to enable a capture. If EXEN4 is cleared, transitions on T4EX will be ignored.
244
SYSCLK
1.
2.
3.
The 16-bit value in Timer 4 (TH4, TL4) is loaded into the capture registers (RCAP4H, RCAP4L).
The Timer 4 External Flag (EXF2) is set to ‘1’.
A Timer 4 interrupt is generated if enabled.
T4EX
T4
12
Crossbar
EXEN4
M
T
4
CKCON
M
0
1
T
2
M
T
1
M
T
0
Figure 22.25. T4 Mode 0 Block Diagram
0
1
TR4
Rev. 1.4
Capture
TCLK
RCAP4L
TL4
RCAP4H
TH4
CP/RL4
EXEN4
TCLK0
RCLK0
EXF4
C/T4
TR4
TF4
Interrupt

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