C8051F226DK Silicon Laboratories Inc, C8051F226DK Datasheet - Page 16

• Manufacturer Part Number: C8051F226DK
• Description: DEV KIT F220/221/226/230/231/236
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F226DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F22x and C8051F23x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F226
• Silicon Family Name: C8051F2xx
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F220, 221, 226, 230, 231, 236
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1241

C8051F2xx
With the CIP-51's maximum system clock at 25 MHz, it has a peak throughput of 25 MIPS. Figure 1.5
shows a comparison of peak throughputs of various 8-bit microcontroller cores with their maximum system
clocks.
1.1.3. Additional Features
The C8051F206, C8051F220/1/6 and C8051F230/1/6 have several key enhancements both inside and
outside the CIP-51 core to improve overall performance and ease of use in end applications.
The extended interrupt handler provides 22 interrupt sources into the CIP-51 (as opposed to 7 for the stan-
dard 8051), allowing the numerous analog and digital peripherals to interrupt the controller. (An interrupt
driven system requires less intervention by the MCU, giving it more effective throughput.) The extra inter-
rupt sources are very useful when building multi-tasking, real-time systems.
There are up to six reset sources for the MCU: an on-board
clock detector, a voltage level detection from Comparator 0, a forced software reset, and an external reset
pin. The RST pin is bi-directional, accommodating an external reset, or allowing the internally generated
reset to be output on the RST pin. The on-board
(digital 1). The user may disable each reset source except for the
software. The watchdog timer may be permanently enabled in software after a power-on reset during
MCU initialization.
The MCU has an internal, stand-alone clock generator that is used by default as the system clock after
reset. If desired, the clock source may be switched "on the fly" to the external oscillator, which can use a
crystal, ceramic resonator, capacitor, RC, or external clock source to generate the system clock. This can
be extremely useful in low power applications, allowing the MCU to run from a slow (power saving) exter-
nal crystal source, while periodically switching to the fast (up to 16MHz) internal oscillator as needed.
16
Figure 1.5. Comparison of Peak MCU Throughputs
25
20
15
10
5
(25 MHz clk)
Silicon Labs
CIP-51
(33 MHz clk)
PIC17C75x
Rev. 1.6
Microchip
V
DD monitor is enabled by pulling the MONEN pin high
V
(33 MHz clk)
DD monitor, a Watchdog Timer, a missing
Philips
80C51
V
DD monitor and Reset Input Pin from
(16 MHz clk)
ADuC812
8051