mc9s12uf32 Freescale Semiconductor, Inc, mc9s12uf32 Datasheet - Page 74

• Manufacturer Part Number: mc9s12uf32
• Description: System Chip Guide V01.05
• Manufacturer: Freescale Semiconductor, Inc

System on a Chip Guide — 9S12UF32DGV1/D V01.05
Integration Module (PIM) PIM_9UF32 Block Guide and the TIM_16B8C Block Guide for information
about pin configurations.
2.5.40 PU0 / CFWAIT / ATAIORDY / SCD — Port U I/O Pin 0
PU0 is a general purpose input or output pin. This pin can be used as CFWAIT of CFHC module,
ATAIORDY of ATA5HC module or SCD of SMHC module. Refer to Table 2-2 for module routing
information. While in reset and immediately out of reset the PU0 pin is configured as a high impedance
input pin. Consult the Port Integration Module (PIM) PIM_9UF32 Block Guide, the CFHC Block Guide
and the ATA5HC Block Guide for information about pin configurations.
2.6 Power Supply Pins
MC9S12UF32 power and ground pins are described below.
2.6.1 VDDR, VSSR - Power & Ground Pins for I/O Drivers & for Internal
Voltage Regulator
External power and ground for I/O drivers of Port E, PWROFF3V, PWROFF5V, BKGD, TEST, RESET,
VREGEN, and REG3V. Also input to the internal voltage regulator.
74
NOTE:
Mnemonic
Table 2-5 MC9S12UF32 Power and Ground Connection Summary
VDD3X
VSS3X
VSSA1
VDDR
VSSR
VDDX
VDDA
VSSX
VSSA
VDD
All VSS pins must be connected together in the application. Because fast signal
transitions place high, short-duration current demands on the power supply, use
bypass capacitors with high-frequency characteristics and place them as close to
the MCU as possible. Bypass requirements depend on MCU pin load.
Nominal
Voltage
3.3/5.0 V
3.3/5.0 V
5.0V
2.5V
3.3V
0 V
0 V
0 V
0V
0V
External power and ground, supply to internal voltage regulator and
supply to pin drivers for Port E, PWROFF3V, PWROFF5V, REF3V,
VREGEN, BKDG and RESET.
Internal digital core power generated by internal regulator.
External power and ground, supply to pin drivers for Ports A, B, R, S
and U.
External power and ground, supply to pin drivers for Port J, M, P, Q and
T.
Internal power and ground for USB PHY generated by internal regulator.
Description
Freescale Semiconductor