Signal Description
MPC5566 Microcontroller Reference Manual, Rev. 2
2-44 Freescale Semiconductor
 
2.3.14.13 External I/O Supply Input
V
DDEHn
V
DDEHn
 is the 3.3–5.0 V, with a tolerance of –10% to +5% external I/O supply input.
2.3.14.14 Fixed 3.3 V Internal Supply Input 
V
DD33
V
DD33
 is the 3.3 V internal supply input.
2.3.14.15 Ground 
V
SS
V
SS
 is the ground reference input.
2.3.15 I/O Power and Ground Segmentation
Table 2-3 gives the power/ground segmentation. Each segment provides the power and ground for the I/O 
pins and can be powered by any voltage within the allowed voltage range regardless of the power on the 
other segments. The power/ground segmentation applies regardless of whether a particular pin is 
configured for its primary function or GPIO.
Table 2-2. MPC5566 Device Power/Ground Segmentation 
Power Segment
Voltag e 
Range
1
I/O Pins Powered by Segment
V
DDA0
5.0 V AN[21:35], REFBYPC, V
RH
V
DDA1
5.0 V AN[0:11], AN[16:20], AN[36:39]
V
DDE2
1.8–3.3 V ADDR[8:31], BDIP, CS[0:3], RD_WR, TA, TEA, TS, WE/BE[0:3]
V
DDE3
—BB, BG, BR, DATA[0:31], GPIO[206:207], OE
V
DDE5
1.8–3.3 V CLKOUT, ENGCLK
V
DDE7
1.8–3.3 V EVTI, EVTO, JCOMP, MCKO, MDO[0:11], MSEO[0:1], RDY, TCK, TDI, TDO, TEST, TMS
V
DDE12
—
CAL_ADDR[12:30], CAL_CS[
0], CAL_CS[1:3], CAL_DATA[0:15], CAL_OE, CAL_RD_WR, 
CAL_TS, CAL_WE[0:1]
V
DDEH1
3.3–5.0 V ETPUA[0:31], TCRCLKA
V
DDEH4
3.3–5.0 V CNRXA, CNRXB, CNTXA, CNTXB, EMIOS[0:23]
V
DDEH6
3.3–5.0 V
BOOTCFG[0:1], CNRXC, CNTXC, PCSA[0:5], PCSB[3:5], PLLCFG[0:1], RESET
, 
RSTCFG
, RSTOUT, RXDA, RXDB, SINA, SCKA, SOUTA, TXDA, TXDB, WKPCFG
V
DDEH8
3.3–5.0 V ETRIG[0:1], GPIO[205]
V
DDEH9
3.3–5.0 V AN[12:15]
V
DDEH10
3.3–5.0 V PCSB[0:2], SCKB, SINB, SOUTB
V
DDSYN
3.3 V EXTAL, XTAL
V
SSA0
GND VRL
V
DD
1.5 V