C8051T612-GQ Silicon Laboratories Inc, C8051T612-GQ Datasheet - Page 181
![IC 8051 MCU 8K BYTE-PROG 32-LQFP](/photos/12/34/123409/c8051t612-gq_sml.jpg)
C8051T612-GQ
Manufacturer Part Number
C8051T612-GQ
Description
IC 8051 MCU 8K BYTE-PROG 32-LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051T61xr
Specifications of C8051T612-GQ
Program Memory Type
OTP
Program Memory Size
8KB (8K x 8)
Package / Case
32-LQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
29
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 21x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051T6x
Core
8051
Data Bus Width
8 bit
Data Ram Size
1.25 KB
Interface Type
I2C/SPI/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
29
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051FT610DK
Minimum Operating Temperature
- 40 C
On-chip Adc
21-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1439
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051T612-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051T612-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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25.2.2. 8-bit Timers with Auto-Reload
When T2SPLIT is set, Timer 2 operates as two 8-bit timers (TMR2H and TMR2L). Both 8-bit timers oper-
ate in auto-reload mode as shown in Figure 25.5. TMR2RLL holds the reload value for TMR2L; TMR2RLH
holds the reload value for TMR2H. The TR2 bit in TMR2CN handles the run control for TMR2H. TMR2L is
always running when configured for 8-bit Mode.
Each 8-bit timer may be configured to use SYSCLK, SYSCLK divided by 12, or the external oscillator clock
source divided by 8. The Timer 2 Clock Select bits (T2MH and T2ML in CKCON) select either SYSCLK or
the clock defined by the Timer 2 External Clock Select bit (T2XCLK in TMR2CN), as follows:
The TF2H bit is set when TMR2H overflows from 0xFF to 0x00; the TF2L bit is set when TMR2L overflows
from 0xFF to 0x00. When Timer 2 interrupts are enabled, an interrupt is generated each time TMR2H over-
flows. If Timer 2 interrupts are enabled and TF2LEN (TMR2CN.5) is set, an interrupt is generated each
time either TMR2L or TMR2H overflows. When TF2LEN is enabled, software must check the TF2H and
TF2L flags to determine the source of the Timer 2 interrupt. The TF2H and TF2L interrupt flags are not
cleared by hardware and must be manually cleared by software.
External Clock / 8
T2MH
SYSCLK / 12
0
0
1
T2XCLK
T2XCLK
0
1
X
0
1
Figure 25.5. Timer 2 8-Bit Mode Block Diagram
TMR2H Clock Source
SYSCLK / 12
External Clock / 8
SYSCLK
SYSCLK
0
1
1
0
T2MH
T2ML
TR2
Rev 1.0
TCLK
TCLK
C8051T610/1/2/3/4/5/6/7
TMR2RLH
TMR2RLL
TMR2H
TMR2L
T2ML
0
0
1
Reload
Reload
T2XCLK
1
X
0
To SMBus
To ADC,
T2SPLIT
SMBus
TF2LEN
T2XCLK
TF2H
TF2L
TR2
External Clock / 8
TMR2L Clock Source
SYSCLK / 12
SYSCLK
Interrupt
181
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