LPC2917/01 NXP [NXP Semiconductors], LPC2917/01 Datasheet - Page 54
LPC2917/01
Manufacturer Part Number
LPC2917/01
Description
ARM9 microcontroller with CAN and LIN
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.LPC291701.pdf
(86 pages)
- Current page: 54 of 86
- Download datasheet (412Kb)
NXP Semiconductors
LPC2917_19_01_2
Preliminary data sheet
6.15.5.1 Functional description
Using the base clocks from the CGU as input, the PMU generates branch clocks to the
rest of the LPC2917/2919/01. Output clocks branched from the same base clock are
phase- and frequency-related. These branch clocks can be individually controlled by
software programming.
The key features are:
The PMU controls all internal clocks coming out of the CGU0 for power-mode
management. With some exceptions, each branch clock can be switched on or off
individually under control of software register bits located in its individual configuration
register. Some branch clocks controlling vital parts of the device operate in a fixed mode.
Table 31
By programming the configuration register the user can control which clocks are switched
on or off, and which clocks are switched off when entering Power-down mode.
Note that the standby-wait-for-interrupt instructions of the ARM968E-S processor (putting
the ARM CPU into a low-power state) are not supported. Instead putting the ARM CPU
into power-down should be controlled by disabling the branch clock for the CPU.
Remark: For any disabled branch clocks to be re-activated their corresponding base
clocks must be running (controlled by CGU0).
Table 31
Every branch clock is related to one particular base clock: it is not possible to switch the
source of a branch clock in the PMU.
Table 31.
Legend:
‘1’ Indicates that the related register bit is tied off to logic HIGH, all writes are ignored
‘0’ Indicates that the related register bit is tied off to logic LOW, all writes are ignored
‘+’ Indicates that the related register bit is readable and writable
Branch clock name
CLK_SAFE
CLK_SYS_CPU
CLK_SYS
CLK_SYS_PCR
CLK_SYS_FMC
•
•
•
•
•
•
•
Individual clock control for all LPC2917/2919/01 sub-modules
Activates sleeping clocks when a wake-up event is detected
Clocks can be individually disabled by software
Supports AHB master-disable protocol when AUTO mode is set
Disables wake-up of enabled clocks when Power-down mode is set
Activates wake-up of enabled clocks when a wake-up event is received
Status register is available to indicate if an input base clock can be safely switched off
(i.e. all branch clocks are disabled)
shows which mode- control bits are supported by each branch clock.
shows the relation between branch and base clocks, see also
Branch clock overview
Rev. 02 — 17 June 2009
Base clock
BASE_SAFE_CLK
BASE_SYS_CLK
BASE_SYS_CLK
BASE_SYS_CLK
BASE_SYS_CLK
LPC2917/01; LPC2919/01
ARM9 microcontroller with CAN and LIN
Implemented switch on/off
mechanism
WAKE-UP
0
+
+
+
+
AUTO
0
+
+
+
+
© NXP B.V. 2009. All rights reserved.
Section
RUN
1
1
1
1
+
6.7.1.
54 of 86
Related parts for LPC2917/01
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Arm9 Microcontroller With Can And Lin
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2420/2460 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2458 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2468 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2470 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2478 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP BlueStreak LH75401/LH75411 family consists of two low-cost 16/32-bit System-on-Chip (SoC) devices
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP LPC3130/3131 combine an 180 MHz ARM926EJ-S CPU core, high-speed USB2
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP LPC3141 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3143 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3152 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3154 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet: