Signal Descriptions
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
2-33
to enable the pull resistors in the pads. On negation of reset, based on which functionality is selected for
the signals, this signal is set to disable the pull resistors, or is continued to be held in its reset state to
indicate that the pulls are disabled only when the output driver is enabled.
2.6.4.4
Pull Device Select (PULL_SEL)
The MIOS14 and the TPU signals have selectable pull-up or pull-down devices. The devices are controlled
by the PULL_SEL signal. A high on the PULL_SEL signal enables pull-up devices on the MIOS14 and
TPU signals. A low enables pull-down devices. Note that the pull devices can be disabled by the
PULL_DIS0 (MIOS14) and PRDS (TPU) bits in the PDMCR register. See
Configuration Register (PDMCR)
2.6.5
Signal Reset States
summarizes the reset states of all signals on the MPC561/MPC563. Note that PD refers to a
weak pull-down, PU2.6 refers to a weak pull-up to 2.6 V, and PU5 refers to a weak pull-up to 5 V. All
control of the weak-pull devices is in the pad module configuration register, described in
NOTE
2.6-V inputs are 5-V tolerant, but 2.6-V outputs are not. Do not connect
2.6-V outputs to a driver or pull-up greater than 3.1 V.
NOTE
Depending on the application, pins may require a pull-down resistor to
avoid getting any command due to noise.
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...