C8051F410-TB Silicon Laboratories Inc, C8051F410-TB Datasheet - Page 177

• Manufacturer Part Number: C8051F410-TB
• Description: BOARD PROTOTYPING W/C8051F410
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F410-TB

• Contents: Board
• Processor To Be Evaluated: C8051F41x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F410
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

20. smaRTClock (Real Time Clock)
C8051F41x devices include a low power smaRTClock Peripheral (Real Time Clock). The smaRTClock has
a dedicated 32 kHz oscillator that can be configured for use with or without a crystal, a 47-bit smaRTClock
timer with alarm, a backup supply regulator and 64 bytes of battery-backed SRAM. When the backup sup-
ply voltage (V
ply voltage (V
The smaRTClock allows a maximum of 137 year 47-bit independent time-keeping when used with a
32.768 kHz Watch Crystal and backup supply voltage of at least 1V. The switchover logic powers smaRT-
Clock from the backup supply when the voltage at V
Alarm and Missing Clock Detector can interrupt the CIP-51, wake the internal oscillator from SUSPEND
mode, or generate a device reset if the smaRTClock timer reaches a pre-set value or the oscillator stops.
Backup RAM
Regulator
V
Backup
XTAL4
DD
RTC-BACKUP
RTC-BACKUP
) is lost.
64B
smaRTClock State Machine
smaRTClock Oscillator
) is powered, the smaRTClock peripheral remains fully functional if the core sup-
Switchover
Figure 20.1. smaRTClock Block Diagram
Logic
XTAL3
CAPTUREn
RAMADDR
RAMDATA
Registers
RTC0XCN
ALARMn
RTC0CN
Internal
Interrupt
Rev. 1.1
RTC-BACKUP
smaRTClock
smaRTClock
Registers
RTC0ADR
Interface
RTC0KEY
RTC0DAT
is greater than V
47-Bit
Timer
C8051F410/1/2/3
DD
. The smaRTClock
V
DD
177