Clocks and Power Control
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
8-21
8.8
Basic Power Structure
8.8.1
General Power Supply Definitions
KAPWR and VSS power the following clock unit modules: oscillator, PITRTCLK and TMBCLK
generation logic, timebase, decrementer, RTC, PIT, system clock control register (SCCR), low-power and
reset-control register (PLPRCR), and reset status register
(RSR). All other circuits are powered by the
normal supply pins: VDD, QVDDL, NVDDL, VDDF, VDDSYN, VFLASH, VDDH and VSS. The power
supply for each block is listed in
The following are the relations between different power supplies:
•
VDD = QVDDL = NVDDL = VDDSYN = VDDF = 2.6 V ± 0.1 V
•
KAPWR = VDD ± 0.2 V (during normal operation)
•
VDDH = VDDA = VFLASH = 5.0 ± 5%
•
KAPWR = 2.6 ± 0.1 V (during standby operation)
•
IRAMSTBY = current source > 50 µA, < 1.75 mA (average)
NOTE
The power supply inputs VDD, QVDDL, NVDDL, VDDSYN, and VDDF
should all be connected to the same 2.6-V power supply. The KAPWR
power supply can be connected to a 2.6-V standby power supply. If
KAPWR is not connected to a standby power supply, it should be connected
to the same power supply as VDD. IRAMSTBY is the input to an
approximately 1.7 volt regulator. It must be connected through a resistor to
a standby power supply. The power supply inputs VDDH and VFLASH
should be connected to the same 5.0-V supply. VDDA can be isolated from
VDDH, but should be the same approximate voltage.
Table 8-7. Power Supplies
Circuit
Power Supply
CLKOUT
SPLL (digital),
System low-power control
Internal logic
Clock drivers
NVDDL/QVDDL
SPLL (analog)
VDDSYN
Main oscillator
Reset machine
Limp mode mechanism
Register control
SCCR, PLLRCR and RSR
PPC RTC, PIT, TB, and DEC
KAPWR
CALRAM, DPTRAM, DECRAM
IRAMSTBY/VDD
1
1
Keep-alive power is supplied by IRAMSTBY, but run
current is provided through VDD
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...