Datasheet

MPC852T PowerQUICC™ Hardware Specifications, Rev. 4
Freescale Semiconductor 9
Thermal Calculation and Measurement
7 Thermal Calculation and Measurement
For the following discussions, P
D
= (V
DDL
x IDDL) + P
I/O
, where P
I/O
is the power dissipation of the I/O
drivers.
NOTE
The V
DDSYN
power dissipation is negligible.
7.1 Estimation with Junction-to-Ambient Thermal Resistance
An estimation of the chip junction temperature, T
J
, in °C can be obtained from the equation:
T
J
= T
A
+(R
θJA
× P
D
)
Input leakage current, Vin = 5.5 V (Except TMS, TRST,
DSCK and DSDI pins) for 5-V tolerant pins
1
I
in
— 100 µA
Input leakage current, Vin = V
DDH
(Except TMS, TRST,
DSCK, and DSDI)
I
In
—10µA
Input leakage current, Vin = 0 V (Except TMS, TRST
,
DSCK and DSDI pins)
I
In
—10µA
Input capacitance
2
C
in
—20pF
Output high voltage, IOH = -2.0 mA, V
DDH
= 3.0 V
Except XTAL and open drain pins
VOH 2.4 — V
Output low voltage
IOL = 2.0 mA (CLKOUT)
IOL = 3.2 mA
3
IOL = 5.3 mA
4
IOL = 7.0 mA (Txd1/pa14, txd2/pa12)
IOL = 8.9 mA (TS
, TA, TEA, BI, BB, HRESET, SRESET)
VOL — 0.5 V
1
The 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 are 5-V tolerant pins.
2
Input capacitance is periodically sampled.
3
A(0:31), TSIZ0/REG, TSIZ1, D(0:31), DP(0:3)/IRQ(3:6), RD/WR, BURST, RSV/IRQ2, IWP(0:1)/VFLS(0:1), RXD3/PA11,
TXD3/PA10, RXD4/PA9, TXD4/PA8, TIN3/BRGO3/CLK5/PA3, BRGCLK2/TOUT3
/CLK6/PA2, TIN4/BRGO4/CLK7/PA1,
TOUT4
/CLK8/PA0, SPISEL/PB31, SPICLK/PB30, SPIMOSI/PB29, BRGO4/SPIMISO/PB28, SMTXD1/PB25,
SMRXD1/PB24, BRGO3/PB15, RTS1
/DREQ0/PC15, RTS3/PC13, RTS4/PC12, CTS3/PC7, CD3/PC6, CTS4/SDACK1/PC5,
CD4
/PC4, MII-RXD3/PD15, MII-RXD2/PD14, MII-RXD1/PD13, MII-MDC/PD12, MII-TXERR/RXD3/PD11,
MII-RX0/TXD3/PD10, MII-TXD0/RXD4/PD9, MII-RXCLK/TXD4/PD8, MII-TXD3/PD5, MII-RXDV/RTS4
/PD6,
MII-RXERR/RTS3
/PD7, MII-TXD2/REJECT3/PD4, MII-TXD1/REJECT4/PD3, MII_CRS, MII_MDIO, MII_TXEN, and MII_COL
4
BDIP/GPL_B(5), BR, BG, FRZ/IRQ6, CS(0:5), CS(6), CS(7), WE0/BS_B0/IORD, WE1/BS_B1/IOWR, WE2/BS_B2/PCOE,
WE3
/ BS_B3/PCWE, BS_A(0:3), GPL_A0/GPL_B0, OE/GPL_A1/GPL_B1, GPL_A(2:3)/GPL_B(2:3)/CS(2:3),
UPWAITA/GPL_A4
, GPL_A5, ALE_A, CE1_A, CE2_A, DSCK, OP(0:1), OP2/MODCK1/STS, OP3/MODCK2/DSDO, and
BADDR(28:30)
Table 5. DC Electrical Specifications (continued)
Characteristic Symbol Min Max Unit