lpc2926 NXP Semiconductors, lpc2926 Datasheet - Page 48

• Manufacturer Part Number: lpc2926
• Description: Lpc2926/2927/2929 Arm9 Microcontroller With Can, Lin, And Usb
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC2926_27_29
Product data sheet
6.15.7.1 Pin description
6.15.7.2 Clock description
6.16 Power, Clock and Reset Control Subsystem (PCRSS)
The QEI module in the MSCSS has the following pins. These are combined with other
functions on the port pins of the LPC2926/2927/2929.
Table 26.
The QEI module is clocked by CLK_MSCSS_QEI, see
this clock is identical to CLK_MSCSS_APB since they are derived from the same base
clock BASE_MSCSS_CLK.
If the QEI is not used its CLK_MSCSS_QEI branch clock can be switched off.
The Power, Clock and Reset Control Subsystem in the LPC2926/2927/2929 includes the
Clock Generator Units (CGU0 and CGU1), a Reset Generator Unit (RGU) and a Power
Management Unit (PMU).
Figure 11
communication with the AHB system bus.
Symbol
QEI0 IDX
QEI0 PHA
QEI0 PHB
provides an overview of the PCRSS. An AHB-to-DTL bridge controls the
QEI pins
All information provided in this document is subject to legal disclaimers.
Pin name
IDX0
PHA0
PHB0
Rev. 5 — 28 September 2010
Direction
IN
IN
IN
ARM9 microcontroller with CAN, LIN, and USB
Description
Index signal. Can be used to reset the position.
Sensor signal. Corresponds to PHA in
quadrature mode and to direction in
clock/direction mode.
Sensor signal. Corresponds to PHB in
quadrature mode and to clock signal in
clock/direction mode.
LPC2926/2927/2929
Table 26
Section
6.7.2. The frequency of
shows the QEI pins.
© NXP B.V. 2010. All rights reserved.
48 of 95