Electrical Characteristics
MPC561/MPC563 Reference Manual, Rev. 1.2
F-64
Freescale Semiconductor
F.20
MIOS Timing Characteristics
All MIOS output pins are slew rate controlled. Slew rate control circuitry adds 90 ns as minimum to the
output timing and 650 ns as a maximum. This slew rate is from 10% V
DD
to 90% V
DD
, an additional 100
ns should be added for total 0 to V
DD
slew rate.
Figure F-47. MCPSM Enable to VS_PCLK Pulse Timing Diagram
F.20.1
MPWMSM Timing Characteristics
Table F-23. MCPSM Timing Characteristics
Note:
After reset MCPSMSCR_PSL[3:0] is set to 0b0000.
Note:
VS_PCLK is the MIOS prescaler clock which is distributed to all the counter (e.g., MPWMSM and
MMCSM) submodules.
Characteristic
Symbol
Delay
Unit
MCPSM enable to VS_PCLK pulse
1
1
The MCPSM clock prescaler value (MCPSMSCR_PSL[3:0]) should be written to the MCPSMSCR (MCPSM
Status/Control Register) before rewriting the MCPSMSCR to set the enable bit (MCPSMSCR_PREN). If this is not
done the prescaler will start with the old value in the MCPSMSCR_PSL[3:0] before reloading the new value into the
counter.
t
CPSMC
(MCPSMSCR_PSL[3:0]) -1
System Clock
Cycles
Table F-24. MPWMSM Timing Characteristics
Note:
All delays are in system clock periods.
Characteristic
Symbol
Min
Max
PWMSM output resolution
t
PWMR
—
1
2.0
2
PWM output pulse
3
t
PWMO
2.0
—
bit (PREN)
MIOB VS_PCLK
t
CPSMC
Prescaler enable
Note 1: f
SYS
is the internal system clock for the IMB3 bus.
Note 2: The numbers associated with the f
SYS
ticks refer to the IMB3 internal state.
Note 3: vs_pclk is the MIOS prescaler clock which is distributed around the MIOS to counter modules such as the
MMCSM and MPWMSM.
≈
≈
f
SYS
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...