c8051t602 Silicon Laboratories, c8051t602 Datasheet - Page 17

• Manufacturer Part Number: c8051t602
• Description: Mixed Signal Otp Eprom Mcu Family
• Manufacturer: Silicon Laboratories

1.1.3. Additional Features
The C8051T600/1/2/3/4/5 SoC family includes several key enhancements to the CIP-51 core and peripher-
als to improve performance and ease of use in end applications.
The extended interrupt handler provides 12 interrupt sources into the CIP-51, allowing 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 interrupt sources are very useful when building
multi-tasking, real-time systems.
Several reset sources are available: power-on reset circuitry (POR), a Supply Monitor, a Watchdog Timer,
a Missing Clock Detector, a voltage level detection from Comparator0, a forced software reset, an external
reset pin, and an illegal OTP read/write detection. Each reset source except for the POR, Reset Input Pin,
and OTP protection may be disabled by the user in software. The WDT may be permanently enabled in
software after a power-on reset during MCU initialization.
The internal oscillator is factory calibrated to 24.5 MHz, and is accurate to ±2% over the entire operating
supply and temperature range. The internal oscillator can be directly divided by factors of 2, 4, or 8 to pro-
vide slower internal clock options. An external oscillator input is also included, allowing an external CMOS
clock, external capacitor, or external RC circuit to generate the system clock. If desired, the system clock
source may be switched on-the-fly to the external oscillator circuit. An external oscillator can be extremely
useful in low power applications, allowing the MCU to run from a slower (power saving) external clock
source, while periodically switching to the internal oscillator when faster operation is required.
EXTCLK
P0.x
P0.y
Oscillator
External
Internal
Source
Clock
Comparator 0
Figure 1.3. On-Chip Clock and Reset
+
-
Clock Select
System
Clock
C0RSEF
Detector
Missing
Clock
(one-
shot)
Microcontroller
EN
Extended Interrupt
CIP-51
Core
Handler
Rev. 0.5
WDT
PCA
EN
System Reset
Power On
Monitor
Supply
Reset
C8051T600/1/2/3/4/5
(Software Reset)
SWRSF
'0'
Illegal OTP
operation
(wired-OR)
Reset
Funnel
/RST
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