MC68331
USER’S MANUAL
ELECTRICAL CHARACTERISTICS
MOTOROLA
A-7
A
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
Group 3:
HALT, RESET
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.
6. Total operating current is the sum of the appropriate I
DD
and I
DDSYN
values. I
DD
values include supply currents for
device modules powered by V
DDE
and V
DDI
pins.
7. Power dissipation measured at specified system clock frequency, all modules active. Power dissipation can be cal-
culated using the expression:
P
D
=
Maximum V
DD
(I
DD
+ I
DDSYN
)
I
DD
includes supply currents for all device modules powered by V
DDE
and V
DDI
pins.
8. This parameter is periodically sampled rather than 100% tested.