Reset
MPC561/MPC563 Reference Manual, Rev. 1.2
7-8
Freescale Semiconductor
Figure 7-2. Reset Configuration Basic Scheme
During the assertion of the PORESET input signal, the chip assumes the default reset configuration. This
assumed configuration changes if the input signal RSTCONF is asserted when the PORESET is negated
or the CLKOUT starts to oscillate. To ensure that stable data is sampled, the hardware configuration is
sampled every eight clock cycles on the rising edge of CLKOUT with a double buffer. The setup time
required for the data bus is approximately 15 cycles (defined as Tsup in the following figures) and the
maximum rise time of HRESET should be less than six clock cycles. In systems where an external reset
configuration word and the TEXP output function are both required, RSTCONF should be asserted until
SRESET is negated.
to
provide sample reset configuration timings.
NOTE
Timing diagrams in the following figures are not to scale.
INT_RESET
M U X
Flash
3 2
3 2
3 2
Has Configuration (HC)
OE
EXT_RESET
(See
)
HRESET/SRESET
RSTCONF
Reset
Config.
Word
Dx (Data line)
Data
Coherency
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...