Electrical Characteristics
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
F-67
F.20.2
MMCSM Timing Characteristics
Figure F-52. MMCSM Minimum Input Pin (Either Load Or Clock) Timing Diagram
NOTE
f
SYS
is the internal system clock for the IMB3 bus.
Table F-25. MMCSM Timing Characteristics
Note:
All delays are in system clock periods.
Characteristic
Symbol
Min
Max
MMCSM input pin period
t
PPER
4
—
MMCSM pin low time
t
PLO
2
—
MMCSM pin high time
t
PHI
2
—
clock pin to counter bus increment.
t
PCCB
1
2
load pin to new counter bus value
t
PLCB
1
2
clock pin to PINC delay
t
PINC
1
2
Load pin to PINL delay
t
PINL
1
2
Counter bus resolution
t
CBR
—
1
1
Minimum output resolution depends on MMCSM and MCPSM prescaler settings.
2
2
2
Maximum resolution is obtained by setting CPSMPSL[3:0] =0x2 and MMCSMSCR_CP[7:0] =0xFF.
Counter bus overflow reload to interrupt flag
t
CBFLG
1
MCPSM enable to counter bus increment.
t
MCMP
(256 - MMCSMSCR_CP) * MCPSMS 2
MMCSM Enable to counter bus increment
(MIN)
3
3
The exact timing from MMCSM enable to the pin being set depends on the timing of the MMCSMSCR register write
and the MCPSM VS_PCLK. The MMCSM enable is taken to mean the MMCSMSCR_CLS[1:0] being written to
2‘b11.
t
MCME
4 + MCPSMSCR_PSL*
(255 - MMCSMSCR_CP)
3
MMCSM Enable to counter bus increment
(MAX)
3
t
MCME
4 + MCPSMSCR_PSL
*
(255 - MMCSMSCR_CP)
+ (MCPSMSCR_PSL
- 1)
3
f
SYS
MMCSM pin
t
PHI
min
t
PLO
min
t
PPER
min
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...