Clocks and Power Control
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
8-29
Figure 8-15. Standby and KAPWR, Other Power-On/Off
NOTE
For more detailed information on power sequencing see
8.11
Clocks Unit Programming Model
8.11.1
System Clock Control Register (SCCR)
The SPLL has a 32-bit control register, SCCR, which is powered by keep-alive power.
Power On
Power Off
Operating
VDDH
VDD, NVVL,
KAPWR
IRAMSTBY
VDDA, VRH
VDDSYN
VFLASH (5 V)
PORESET
HRESET
No Battery Connect Battery
No Battery
QVDDL
1
VDDH
≥
QVDDL - 0.5 V
VDDA can lag VDDH, and VDDSYN can lag QVDDL, but both must be at a valid level before resets are negated.
2
If keep-alive functions are NOT used, then when system power is on: KAPWR = QVDDL ± 0.1 V; KAPWR
≤
2.7 V
3
If keep-alive functions ARE used, then KAPWR = QVDDL = NVDDL = 2.6 V ± 0.1 V when system power is on
KAPWR = 2.6 V ± 0.1 V when system power is off. IRAMSTBY should be powered prior to the other supplies. If
IRAMSTBY is powered at the same time as the other supplies, it should be allowed to stabilize before PORESET
is negated. Normal system power is defined as QVDDL = VDD = VDDF = VDDSYN = KAPWR = 2.6 ± 0.1 V and
VDDA = VDDH = VFLASH = 5.0 ± 0.25 V. Flash programming requirements are the same as normal system
power. VFLASH should always be 5.0 ± 0.25 V. Note: Flash is not implemented on the MPC561.
4
Do not hold the 2.6-V supplies at ground while VDDH/VDDA is ramping to 5 V.
5
If 5 V is applied before the 2.6-V supply, all 5-V outputs will be in indeterminate states until the 2.6-V supply
reaches a level that allows reset to be distributed throughout the device If 5 V is applied before the 2.6-V supply,
all 5-V outputs will be in indeterminate states until the 2.6-V supply reaches a level that allows reset to be
distributed throughout the device
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...