Notes for Tables A–5 and A–5a
1. Applies to:
Port E [7:4] — SIZ[1:0], AS, DS
Port F [7:0] — IRQ[7:1], MODCLK
Port GP [7:0] — IC4/OC5/OC1, IC[3:1], OC[4:1]/OC1
Port QS [7:0] — TXD, PCS[3:1],ÊPCS0/SS, SCK, MOSI, MISO
BKPT/DSCLK, IFETCH, RESET, RXD, TSTME/TSC
EXTAL (when PLL enabled)
2. Input-Only Pins: EXTAL, TSTME/TSC, BKPT, RXD
Output-Only Pins: CSBOOT, BG/CS, CLKOUT, FREEZE/QUOT, IPIPE
Input/Output Pins:
Group 1:
Port GP [7:0] — IC4/OC5/OC1, IC[3:1], OC[4:1]/OC1
DATA[15:0], IFETCH
Group 2 :
Port C [6:0] — ADDR[22:19]/CS[9:6], FC[2:0]/CS[5:3]
Port E [7:0] — SIZ[1:0], AS, DS, AVEC, RMC, DSACK[1:0]
Port F [&:0] — IRQ[7:1], MODCLK
Port QS [7:3] — TXD, PCS[3:1],ÊPCS0/SS
ADDR23/CS10/ECLK, ADDR[18:0], R/W, BERR, BR/CS0, BGACK/CS2
HALT, RESET
Group 3:
Group 4:
MISO, MOSI, SCK
3. Does not apply to HALT and RESET because they are open drain pins. Does not apply to Port QS [7:0] (TXD,
PCS[3:1],ÊPCS0/SS, SCK, MOSI, MISO) in wired-OR mode.
4. Current measured with system clock frequency of 16.78 MHz, all modules active.
5. Use of an active pulldown device is recommended.
A
6. Total operating current is the sum of the appropriate I and I
values. I values include supply currents for
DD
DD
DDSYN
device modules powered by V
and V
pins.
DDE
DDI
7. Power dissipation measured at specified system clock frequency, all modules active. Power dissipation can be cal-
culated using the expression:
P = Maximum V (I + I
)
D
DD DD
DDSYN
I
includes supply currents for all device modules powered by V
and V pins.
DDI
DD
DDE
8. This parameter is periodically sampled rather than 100% tested.
MC68331
ELECTRICAL CHARACTERISTICS
MOTOROLA
A-7
USER’S MANUAL
MOTOROLA [ MOTOROLA ]
