LPC2470FBD208,551 NXP Semiconductors, LPC2470FBD208,551 Datasheet - Page 645
![IC ARM7 MCU LCD 208-LQFP](/photos/12/13/121391/208-lqfp_sot459-1_pkg_sml.jpg)
LPC2470FBD208,551
Manufacturer Part Number
LPC2470FBD208,551
Description
IC ARM7 MCU LCD 208-LQFP
Manufacturer
NXP Semiconductors
Series
LPC2400r
Datasheets
1.OM11077.pdf
(792 pages)
2.LPC2470FET208551.pdf
(89 pages)
3.LPC2470FET208551.pdf
(91 pages)
Specifications of LPC2470FBD208,551
Package / Case
208-LQFP
Core Processor
ARM7
Core Size
16/32-Bit
Speed
72MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
Number Of I /o
160
Program Memory Type
ROMless
Ram Size
98K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
LPC24
Core
ARM7TDMI-S
Data Bus Width
16 bit, 32 bit
Data Ram Size
98 KB
Interface Type
CAN/I2C/I2S/SPI/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB2470U
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Package
208LQFP
Device Core
ARM7TDMI-S
Family Name
LPC2000
Maximum Speed
72 MHz
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4361-5
935284068551
LPC2470FBD208-S
935284068551
LPC2470FBD208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2470FBD208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
UM10237_4
User manual
6.7 PWM Latch Enable Register (PWM0LER - 0xE001 4050 and PWM1LER
0xE001 8050)
The PWM Latch Enable registers are used to control the update of the PWM Match
registers when they are used for PWM generation. When software writes to the location of
a PWM Match register while the Timer is in PWM mode, the value is actually held in a
shadow register and not used immediately.
When a PWM Match 0 event occurs (normally also resetting the timer in PWM mode), the
contents of shadow registers will be transferred to the actual Match registers if the
corresponding bit in the Latch Enable register has been set. At that point, the new values
will take effect and determine the course of the next PWM cycle. Once the transfer of new
values has taken place, all bits of the LER are automatically cleared. Until the
corresponding bit in the PWMLER is set and a PWM Match 0 event occurs, any value
written to the PWM Match registers has no effect on PWM operation.
For example, if PWM is configured for double edge operation and is currently running, a
typical sequence of events for changing the timing would be:
The order of writing the two PWM Match registers is not important, since neither value will
be used until after the write to PWMLER. This insures that both values go into effect at the
same time, if that is required. A single value may be altered in the same way if needed.
The function of each of the bits in the PWMLER is shown in
Table 564: PWM Latch Enable Register (PWM0LER - address 0xE001 4050 and PWM1LER
Bit Symbol
0
1
2
3
4
•
•
•
•
Write a new value to the PWM Match1 register.
Write a new value to the PWM Match2 register.
Write to the PWMLER, setting bits 1 and 2 at the same time.
The altered values will become effective at the next reset of the timer (when a PWM
Match 0 event occurs).
Enable PWM
Match 0 Latch
Enable PWM
Match 1 Latch
Enable PWM
Match 2 Latch
Enable PWM
Match 3 Latch
Enable PWM
Match 4 Latch
address 0xE001 8050) bit description
Description
PWM MR0 register update control. Writing a one to this bit allows
the last value written to the PWM Match Register 0 to be become
effective when the timer is next reset by a PWM Match event. See
Section 25–6.4 “PWM Match Control Register (PWM0MCR -
0xE001 4014 and PWM1MCR 0xE001
PWM MR1 register update control. See bit 0 for details.
PWM MR2 register update control. See bit 0 for details.
PWM MR3 register update control. See bit 0 for details.
PWM MR4 register update control. See bit 0 for details.
Rev. 04 — 26 August 2009
Chapter 25: LPC24XX Pulse Width Modulator PWM0/PWM1
8014)”.
Table
25–564.
UM10237
© NXP B.V. 2009. All rights reserved.
645 of 792
Reset
Value
0
0
0
0
0
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