C8051F338-GM Silicon Laboratories Inc, C8051F338-GM Datasheet - Page 180
![IC MCU 16K FLASH 24QFN](/photos/12/15/121587/c8051f9xx_24-qfn_sml.jpg)
C8051F338-GM
Manufacturer Part Number
C8051F338-GM
Description
IC MCU 16K FLASH 24QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F33xr
Specifications of C8051F338-GM
Program Memory Type
FLASH
Program Memory Size
16KB (16K x 8)
Package / Case
24-QFN
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
21
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
I2C/SMBus/SPI/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
21
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
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F336DK
Minimum Operating Temperature
- 40 C
On-chip Adc
16-ch x 10-bit
On-chip Dac
1-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
336-1427-5
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C8051F336/7/8/9
24. Timers
Each MCU includes four counter/timers: two are 16-bit counter/timers compatible with those found in the
standard 8051, and two are 16-bit auto-reload timer for use with the ADC, SMBus, or for general purpose
use. These timers can be used to measure time intervals, count external events and generate periodic
interrupt requests. Timer 0 and Timer 1 are nearly identical and have four primary modes of operation.
Timer 2 and Timer 3 offer 16-bit and split 8-bit timer functionality with auto-reload. Additionally, Timer 3
offers the ability to be clocked from the external oscillator while the device is in Suspend mode, and can be
used as a wake-up source. This allows for implementation of a very low-power system, including RTC
capability.
Timers 0 and 1 may be clocked by one of five sources, determined by the Timer Mode Select bits
(T1M–T0M) and the Clock Scale bits (SCA1–SCA0). The Clock Scale bits define a pre-scaled clock from
which Timer 0 and/or Timer 1 may be clocked (See SFR Definition 24.1 for pre-scaled clock selection).
Timer 0/1 may then be configured to use this pre-scaled clock signal or the system clock. Timer 2 and
Timer 3 may be clocked by the system clock, the system clock divided by 12, or the external oscillator
clock source divided by 8.
Timer 0 and Timer 1 may also be operated as counters. When functioning as a counter, a counter/timer
register is incremented on each high-to-low transition at the selected input pin (T0 or T1). Events with a fre-
quency of up to one-fourth the system clock frequency can be counted. The input signal need not be peri-
odic, but it should be held at a given level for at least two full system clock cycles to ensure the level is
properly sampled.
180
Two 8-bit counter/timers (Timer 0
Timer 0 and Timer 1 Modes:
8-bit counter/timer with auto-
13-bit counter/timer
16-bit counter/timer
reload
only)
Two 8-bit timers with auto-reload
16-bit timer with auto-reload
Timer 2 Modes:
Rev.1.0
Two 8-bit timers with auto-reload
16-bit timer with auto-reload
Timer 3 Modes:
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