66-MHz Electrical Characteristics
MPC561/MPC563 Reference Manual, Rev. 1.2
G-60
Freescale Semiconductor
Figure G-46. MCPSM Enable to VS_PCLK Pulse Timing Diagram
G.21.1
MPWMSM Timing Characteristics
Table G-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 G-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
—
MPWMI input pin to MPWMSCR_PIN
status set
t
PIN
1
2
CPSM enable to output set
4
t
PWMP
(MPWMPERR - MP 1) *
(256 - MPWMSCR_CP) * MCPSMS 1
MPWMSM Enable to output set (MIN)
5
t
PWME
(MPWMPERR - MPWMPULR) * (256 - MPWMSCR_CP) *
MCPSMS 3 +
(255 - MPWMSCR_CP) * MCPSMSCR_PSL
6
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...