LPC1114FHN33/203,5 NXP Semiconductors, LPC1114FHN33/203,5 Datasheet - Page 509

• Manufacturer Part Number: LPC1114FHN33/203,5
• Description: ARM Microcontrollers - MCU Cortex-M0 32 kB Fl 8 kB SRAM
• Manufacturer: NXP Semiconductors

Specifications of LPC1114FHN33/203,5

• Rohs: yes
• Core: ARM Cortex M0
• Processor Series: LPC1114
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 8 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 3.6 V
• Operating Temperature Range: - 65 C to + 150 C
• Package / Case: HVQFN-33
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 260

NXP Semiconductors
UM10398
User manual
28.6.4.4 SysTick Calibration Value Register
28.6.4.5 SysTick usage hints and tips
Table 460. SYST_CVR bit assignments
The SYST_CALIB register indicates the SysTick calibration properties. See the register
summary in
Table 461. SYST_CALIB register bit assignments
If calibration information is not known, calculate the calibration value required from the
frequency of the processor clock or external clock.
The interrupt controller clock updates the SysTick counter. If this clock signal is stopped
for low power mode, the SysTick counter stops.
Ensure software uses word accesses to access the SysTick registers.
If the SysTick counter reload and current value are undefined at reset, the correct
initialization sequence for the SysTick counter is:
Bits
[31:24]
[23:0]
Bits
[31]
[30]
[29:24]
[23:0]
1. Program reload value.
2. Clear current value.
3. Program Control and Status register.
-
CURRENT
Name
Name
NOREF
SKEW
-
TENMS
Table 28–457
Chapter 28: LPC111x/LPC11Cxx Appendix: ARM Cortex-M0 reference
All information provided in this document is subject to legal disclaimers.
Rev. 12 — 24 September 2012
Function
Reads as one. Indicates that no separate reference clock is provided.
Reads as one. Calibration value for the 10ms inexact timing is not known
because TENMS is not known. This can affect the suitability of SysTick
as a software real time clock.
Reserved.
Reads as zero. Indicates calibration value is not known.
for its attributes. The bit assignments are:
Function
Reserved.
Reads return the current value of the SysTick counter.
A write of any value clears the field to 0, and also clears the
SYST_CSR.COUNTFLAG bit to 0.
UM10398
© NXP B.V. 2012. All rights reserved.
509 of 538