C8051F540-TB Silicon Laboratories Inc, C8051F540-TB Datasheet - Page 127

BOARD PROTOTYPE W/C8051F540

C8051F540-TB

Manufacturer Part Number
C8051F540-TB
Description
BOARD PROTOTYPE W/C8051F540
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheets

Specifications of C8051F540-TB

Contents
Board
Processor To Be Evaluated
C8051F54x
Processor Series
C8051F54x
Interface Type
USB
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F54x
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1672
C8051F54x
15.2. Stop Mode
Setting the Stop Mode Select bit (PCON.1) causes the controller core to enter Stop mode as soon as the
instruction that sets the bit completes execution. In Stop mode the internal oscillator, CPU, and all digital
peripherals are stopped; the state of the external oscillator circuit is not affected. Each analog peripheral
(including the external oscillator circuit) may be shut down individually prior to entering Stop Mode. Stop
mode can only be terminated by an internal or external reset. On reset, the device performs the normal
reset sequence and begins program execution at address 0x0000.
If enabled, the Missing Clock Detector will cause an internal reset and thereby terminate the Stop mode.
The Missing Clock Detector should be disabled if the CPU is to be put to in STOP mode for longer than the
MCD timeout of 100 µs.
15.3. Suspend Mode
Setting the SUSPEND bit (OSCICN.5) causes the hardware to halt the CPU and the high-frequency inter-
nal oscillator, and go into Suspend mode as soon as the instruction that sets the bit completes execution.
All internal registers and memory maintain their original data. Most digital peripherals are not active in Sus-
pend mode. The exception to this is the Port Match feature.
Suspend mode can be terminated by three types of events, a port match (described in Section “18.5. Port
Match” on page 157), a Comparator low output (if enabled), or a device reset event. When Suspend mode
is terminated, the device will continue execution on the instruction following the one that set the SUSPEND
bit. If the wake event was configured to generate an interrupt, the interrupt will be serviced upon waking
the device. If Suspend mode is terminated by an internal or external reset, the CIP-51 performs a normal
reset sequence and begins program execution at address 0x0000.
Note: When entering Suspend mode, firmware must set the ZTCEN bit in REF0CN (SFR Definition 7.1).
Rev. 1.1
127

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