NUC100LC1BN Nuvoton Technology Corporation of America, NUC100LC1BN Datasheet - Page 194

• Manufacturer Part Number: NUC100LC1BN
• Description: IC MCU 32BIT 32KB FLASH 48LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r

Specifications of NUC100LC1BN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LVD, POR, PS2, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.3.6
This device is equipped a power-of-2 frequency divider which is composed by16 chained divide-
by-2 shift registers. One of the 16 shift register outputs selected by a sixteen to one multiplexer is
reflected to CLKO function pin. Therefore there are 16 options of power-of-2 divided clocks with
the frequency from F
The output formula is F
divider output frequency and N is the 4-bit value in FSEL (FRQDIV[3:0]).
When write 1 to DIVIDER_EN (FRQDIV[4]), the chained counter starts to count. When write 0 to
DIVIDER_EN (FRQDIV[4]), the chained counter continuously runs till divided clock reaches low
state and stay in low state.
Frequency Divider Output
FRQDIV_CLK
divide-by-2 counter
NuMicro™ NUC100 Series Technical Reference Manual
Enable
DIVIDER_EN
(FRQDIV[4])
in
1/2
/2
Figure 5-8 Block Diagram of Frequency Divider
Figure 5-7 Clock Source of Frequency Divider
1
out
to F
= F
1/2
in
/2
2
in
16
/2
where Fin is input clock frequency to the clock divider.
(N+1)
1/2
divide-by-2 counter
3
, where F
16 chained
- 194 -
…...
in
1/2
is the input clock frequency, F
15
Publication Release Date: Dec. 22, 2010
1/2
16
0000
0001
1110
1111
:
:
(FRQDIV[3:0])
16 to 1
FSEL
MUX
Revision V1.06
out
CLKO
is the clock