C8051F231-GQR Silicon Laboratories Inc, C8051F231-GQR Datasheet - Page 128
![IC 8051 MCU 8K FLASH 32LQFP](/photos/15/92/159269/tqfp-32_sml.jpg)
C8051F231-GQR
Manufacturer Part Number
C8051F231-GQR
Description
IC 8051 MCU 8K FLASH 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F2xxr
Specifications of C8051F231-GQR
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
22
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
Processor Series
C8051F2x
Core
8051
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
32
Number Of Timers
3 bit
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
C8051F226DK
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F231-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
C8051F2xx
17.1.4. Mode 3: Two 8-bit Counter/Timers (Timer 0 Only)
Timer 0 and Timer 1 behave differently in Mode 3. Timer 0 is configured as two separate 8-bit counter/tim-
ers held in TL0 and TH0. The counter/timer in TL0 is controlled using the Timer 0 control/status bits in
TCON and TMOD: TR0, C/T0, GATE0 and TF0. It can use either the system clock or an external input sig-
nal as its time base. The TH0 register is restricted to a timer function sourced by the system clock. TH0 is
enabled using the Timer 1 run control bit TR1. TH0 sets the Timer 1 overflow flag TF1 on overflow and
thus controls the Timer 1 interrupt.
Timer 1 is inactive in Mode 3, so with Timer 0 in Mode 3, Timer 1 can be turned off and on by switching it
into and out of its Mode 3. When Timer 0 is in Mode 3, Timer 1 can be operated in Modes 0, 1 or 2, but
cannot be clocked by external signals nor set the TF1 flag and generate an interrupt. However, the Timer
1 overflow can be used for baud rate generation. Refer to Section 16 (UART) for information on configur-
ing Timer 1 for baud rate generation.
128
SYSCLK
/INT0
T0
GATE0
PORT0
PORT0
MUX
MUX
12
TR0
TR1
Figure 17.3. T0 Mode 3 Block Diagram
0
1
CKCON
T
M
2
M
T
1
M
T
0
1
0
C/T0
G
A
T
E
1
C
Rev. 1.6
T
1
/
M
T
1
1
TMOD
M
T
1
0
G
A
E
T
0
C
T
0
/
M
T
0
1
M
T
0
0
(8 bits)
(8 bits)
TH0
TL0
TR1
TR0
TF1
TF0
IE1
IT1
IE0
IT0
Interrupt
Interrupt