C8051F326-GM Silicon Laboratories Inc, C8051F326-GM Datasheet - Page 127

• Manufacturer Part Number: C8051F326-GM
• Description: IC 8051 MCU FLASH 16K 28QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F326-GM

• Program Memory Type: FLASH
• Program Memory Size: 16KB (16K x 8)
• Package / Case: 28-QFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: UART/USART, USB
• Peripherals: POR
• Number Of I /o: 15
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F3x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: UART/USB
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• 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: C8051F320DK
• Minimum Operating Temperature: - 40 C
• No. Of I/o's: 15
• Ram Memory Size: 1280Byte
• Cpu Speed: 25MHz
• No. Of Timers: 2
• Digital Ic Case Style: QFN
• Supply Voltage: RoHS Compliant
• Package: 28QFN EP
• Device Core: 8051
• Family Name: C8051F326
• Maximum Speed: 25 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1450 - ADAPTER PROGRAM TOOLSTICK F326336-1306 - KIT DEV FOR C8051F326/7
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1296-5

14. Timers
Each MCU includes two 16-bit timers compatible with those found in the standard 8051. These timers can
be used to measure time intervals and generate periodic interrupt requests. Timer 0 and Timer 1 are nearly
identical and have four primary modes of operation.
Timers 0 and 1 may be clocked by one of four 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 Figure 14.3 for pre-scaled clock selection). Timer 0/1 may
then be configured to use this pre-scaled clock signal or the system clock.
Timers 0 and 1 have a gate mode which allows the timer to run only when an external interrupt is active
(/INT0 for Timer 0 and /INT1 for Timer 1. This mode facilitates pulse width measurements on input on P0.2
(Timer 0) and Low Frequency oscillator calibration when used with Timer 1.
14.1. Timer 0 and Timer 1 Operating Modes
Each timer is implemented as a 16-bit register accessed as two separate bytes: a low byte (TL0 or TL1)
and a high byte (TH0 or TH1). The Timer Control register (TCON) is used to enable Timer 0 and Timer 1 as
well as indicate status. Timer 0 interrupts can be enabled by setting the ET0 bit in the IE register (Section
“6.3.5. Interrupt Register Descriptions” on page 50); Timer 1 interrupts can be enabled by setting the ET1
bit in the IE register (SFR Definition 6.7). Both timers operate in one of four primary modes selected by set-
ting the Mode Select bits T1M1-T0M0 in the Timer Mode register (TMOD). Each timer can be configured
independently. Each operating mode is described below.
13-bit timer
16-bit timer
8-bit timer with auto-reload
Two 8-bit timers (Timer 0 only)
Table 14.1. Timer Modes
Timer 0 and Timer 1 Modes:
Rev. 1.1
C8051F326/7
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