Datasheet

MPC852T PowerQUICC™ Hardware Specifications, Rev. 4
8 Freescale Semiconductor
Power Dissipation
5 Power Dissipation
Table 4 provides power dissipation information. The modes are 1:1, where CPU and bus speeds are equal,
and 2:1 mode, where CPU frequency is twice bus speed.
6 DC Characteristics
Table 5 provides the DC electrical characteristics for the MPC852T.
Table 4. Power Dissipation (P
D
)
Die Revision Bus Mode
Frequency
(MHz)
Typical
1
1
Typical power dissipation is measured at 1.9 V.
Maximum
2
2
Maximum power dissipation at V
DDL
and V
DDSYN
is at 1.9 V. and V
DDH
is at 3.465 V.
NOTE
Values in Table 4 represent V
DDL
-based power
dissipation, and do not include I/O power dissipation
over V
DDH
. I/O power dissipation varies widely by
application that buffer current can cause, depending on
external circuitry.
The V
DDSYN
power dissipation is negligible.
Unit
0
1:1
50 110 140 mW
66 150 180 mW
2:1
66 140 160 mW
80 170 200 mW
100 210 250 mW
Table 5. DC Electrical Specifications
Characteristic Symbol Min Max Unit
Operating voltage V
DDH
3.135 3.465 V
V
DDL
1.7 1.9 V
V
DDSYN
1.7 1.9 V
Difference between
V
DDL
to V
DDSYN
—100mV
Input high voltage (all inputs except PA[0:3], PA[8:11],
PB15, PB[24:25]; PB[28:31], PC[4:7], PC[12:13], PC15,
PD[3:15], TDI, TDO, TCK, TRST
, TMS, MII_TXEN,
MII_MDIO)
1
V
IH
2.0 3.465 V
Input low voltage V
IL
GND 0.8 V
EXTAL, EXTCLK input high voltage V
IHC
0.7 × V
DDH
V
DDH
V