C8051F021-GQ Silicon Laboratories Inc, C8051F021-GQ Datasheet - Page 246

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
22.3.3. Mode 2: Baud Rate Generator
Timer 4 can be used as a baud rate generator for UART1 when UART1 is operated in modes 1 or 3 (refer to Section
“21.1. UART1 Operational
Rate Generator mode, Timer 4 works similarly to the auto-reload mode. On overflow, the 16-bit value held in the two
capture registers (RCAP4H, RCAP4L) is automatically loaded into the counter/timer register. However, the TF4
overflow flag is not set and no interrupt is generated. Instead, the overflow event is used as the input to the UART's
shift clock. Timer 4 overflows can be selected to generate baud rates for transmit and/or receive independently.
The Baud Rate Generator mode is selected by setting RCLK1 (T4CON.5) and/or TCLK1 (T4CON.4) to ‘1’. When
RCLK1 or TCLK1 is set to logic 1, Timer 4 operates in the auto-reload mode regardless of the state of the CP/RL4
bit. Note that in Baud Rate Generator mode, the Timer 4 timebase is the system clock divided by two. When selected
as the UART1 baud clock source, Timer 4 defines the UART1 baud rate as follows:
Baud Rate = SYSCLK / ((65536 - [RCAP4H, RCAP4L] ) * 32)
If a different time base is required, setting the C/T4 bit to logic 1 will allow the timebase to be derived from the exter-
nal input pin T4. In this case, the baud rate for the UART is calculated as:
Baud Rate = F
Where F
held in the capture registers.
As explained above, in Baud Rate Generator mode, Timer 4 does not set the TF4 overflow flag and therefore cannot
generate an interrupt. However, if EXEN4 is set to logic 1, a high-to-low transition on the T4EX input pin will set the
EXF4 flag and a Timer 4 interrupt will occur if enabled. Therefore, the T4EX input may be used as an additional
external interrupt source.
246
SYSCLK
Overflow
Timer 1
T2EX
CLK
T2
is the frequency of the signal (TCLK) supplied to Timer 4 and [RCAP4H, RCAP4L] is the 16-bit value
CLK
Crossbar
Crossbar
/ ( (65536 - [RCAP4H, RCAP4L] ) * 16)
2
2
EXEN2
TR2
Modes” on page
C/T2
0
1
M
O
S
D
0
0
1
Figure 22.27. T4 Mode 2 Block Diagram
PCON
O
S
T
P
D
L
E
I
216
TCLK
for more information on the UART1 operational modes). In Baud
CP/RL2
RCAP2L
EXEN2
TCLK0
RCLK0
Rev. 1.4
EXF2
C/T2
TR2
TF2
TL2
RCAP2H
TH2
Interrupt
Reload
Timer 2
Overflow
TCLK0
RCLK0
0
1
0
1
16
16
RX0 Clock
TX0 Clock

Related parts for C8051F021-GQ