PXD20 Datasheet, PDF (27/130 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Pinout and signal descriptions
2.4 Signal description
The following sections provide signal descriptions and related information about the signals’ functionality and configuration.
2.4.1 Pad configuration during reset phases
All pads have a fixed configuration under reset.
During the power-up phase, all pads are forced to tristate.
After power-up phase, all pads are floating with the following exceptions:
• PB[5] (FAB) is pull-down. Without external strong pull-up the device starts fetching from flash memory.
• RESET pad is driven low. This is released only after PHASE2 reset completion.
• Fast (4-16 MHz) external oscillator pads (EXTAL, XTAL) are tristate.
• The following pads are pull-up:
— PB[6]
— PH[0]
— PH[1]
— PH[3]
2.4.2 Voltage supply pins
Voltage supply pins are used to provide power to the device. Two dedicated pins are used for 1.2 V regulator stabilization.
Table 3. Voltage supply pin descriptions
Supply pin
Function
V_DD121
1.2 V core supply (1.08 V - 1.32 V)
Pin number
176 LQFP
208 LQFP
416 TEPBGA
23, 50, 67, 110, 138, 23, 58, 79, 136, 162, K10,K12,K14,K16,L
175
186, 207
11,L13,L15,L17,M1
0,M16,N11,N17,P1
0,P16,R11,R17,T10
,T12,T14,T16,U11,
U13,U15,U17
PXD20 Microcontroller Data Sheet, Rev. 2
Freescale Semiconductor
Preliminary—Subject to Change Without Notice
27