66-MHz Electrical Characteristics
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
G-61
Figure G-47. MPWMSM Minimum Output Pulse Example Timing Diagram
NOTE
f
SYS
is the internal system clock for the IMB3 bus.
Figure G-48. MCPSM Enable to MPWMO Output Pin Rising Edge Timing Diagram
MPWMSM Enable to output set (MAX)
5
t
PWME
t
PWME
(MIN) + MCPSMSCR_PSL - 1
6
Interrupt Flag to output pin reset (period
start)
7
t
FLGP
(256 - MPWMSCR_CP) * MCPSMSCR_PSL - 1
6
1
Minimum output resolution depends on MPWMSM and MCPSM prescaler settings.
2
Maximum resolution is obtained by setting CPSMPSL[3:0] =0x2 and MPWMSCR_CP[7:0] =0xFF.
3
Excluding the case where the output is always “0”.
4
With MPWMSM enabled before enabling the MCPSM. Please also see NOTE 1 on the MCPSM timing
information.
5
The exact timing from MPWMSM enable to the pin being set depends on the timing of the register write and the
MCPSM VS_PCLK.
6
When MCPSMSCR_PSL = 0x0000, this gives a prescale value of 16 and it is 16 which should be used in these
calculations. When MCPSMSCR_PSL = 0x0001, the CPSM is inactive.
7
The interrupt is set before the output pin is reset (Signifying the start of a new period).
Table G-24. MPWMSM Timing Characteristics
Note:
All delays are in system clock periods.
Characteristic
Symbol
Min
Max
f
SYS
MPWMO output pin
min
t
PWMO
f
SYS
bit (PREN)
MIOB VS_PCLK
t
PWMP
Prescaler enable
3
4
1
MPWMO output pin
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...