EFM32TG210F32 Energy Micro, EFM32TG210F32 Datasheet - Page 285

• Manufacturer Part Number: EFM32TG210F32
• Description: MCU 32BIT 32KB FLASH 32-QFN
• Manufacturer: Energy Micro
• Series: Tiny Geckor

Specifications of EFM32TG210F32

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.8 V
• Data Converters: A/D 4x12b, D/A 1x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad
• Processor Series: EFM32
• Core: ARM Cortex-M3
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: UART, I2C, SPI
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 1
• Operating Supply Voltage: 1.8 V to 3.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Processor To Be Evaluated: EFM32TG210
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

19.3.3.2.4 Double Mode
2010-12-21 - d0034_Rev0.90
Figure 19.4. LETIMER Buffered Repeat State Machine
The Double repeat mode works much like the one-shot repeat mode. The difference is that, where the
one-shot mode counts as long as LETIMERn_REP0 is larger than 0, the double mode counts as long as
either LETIMERn_REP0 or LETIMERn_REP1 is larger than 0. As an example, say LETIMERn_REP0
is 3 and LETIMERn_REP1 is 10 when the timer is started. If no further interaction is done with the
timer, LETIMERn_REP0 will now be decremented 3 times, and LETIMERn_REP1 will be decremented
10 times. The timer counts a total of 10 times, and LETIMERn_REP0 is 0 after the first three timer
underflows and stays at 0. LETIMERn_REP0 and LETIMERn_REP1 can be written at any time. After a
write to either of these, the timer is guaranteed to underflow at least the written number of times if the
timer is running. Use the Double repeat mode to generate output on both the LETIMER outputs at the
same time. The state machine for this repeat mode can be seen in Figure 19.5 (p. 286) .
CNT = CNT - 1
CNT = TOP*
CNT = TOP* *
If (BUFTOP)
REP0 = REP1
REP1
COMP0 = COMP1
USED
= 1
NO
NO
NO
NO
REP0 = = 0
REP1 = = 0
CNT = = 0
START
YES
YES
YES
YES
If (COMP0TOP)
Else
TOP*
TOP* = COMP0
TOP* = 0xFFFF
NO
! REP1
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285
USED
RUNNING
CNT = = 0
REP0 < 2
YES
YES
YES
and ! REP1 ! = 0
NO
Wait for positive clock edge
NO
TOP* *
If (! COMP0TOP)
Else if (BUFTOP)
Else
NO
YES
TOP* * = 0xFFFF
TOP* * = COMP1
TOP* * = COMP0
CNT = CNT - 1
CNT = TOP*
If (! START)
CNT = TOP*
If (BUFTOP)
REP0 = REP1
REP1
STOP = 1
REP0 = 0
COMP0 = COMP1
REP0 = REP0 - 1
USED
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= 1
If (STOP)
Else if (START)
End if
START = 0
STOP = 0
RUNNING = 0
RUNNING = 1