MC912DG128A Motorola, MC912DG128A Datasheet - Page 361

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

11-elec
MOTOROLA
Frequency of operation
E-clock period
Crystal frequency
External oscillator frequency
Processor control setup time
t
Reset input pulse width
To guarantee external reset vector
Minimum input time (can be preempted by internal reset)
Mode programming setup time
Mode programming hold time
Interrupt pulse width, IRQ edge-sensitive mode
PW
Wait recovery startup time
Timer input capture pulse width
PCSU
IRQ
t
cyc
NOTES:
1. Rising edge sensitive input
2. Falling edge sensitive input
PT7
PT7
2t
PT[7:0]
PT[7:0]
cyc
1
2
2 30
1
2
20
Characteristic
1. RESET is recognized during the first clock cycle it is held low. Internal circuitry then drives
PW
PW
the pin low for 16 clock cycles, releases the pin, and samples the pin level 8 cycles later
to determine the source of the interrupt.
TIM
PA
Table 76 Control Timing
Figure 62 Timer Inputs
Electrical Characteristics
Symbol
PW
PW
PW
t
f
t
t
t
PCSU
XTAL
WRS
t
MPH
MPS
f
cyc
f
eo
RSTL
o
IRQ
TIM
MC68HC912DT128A Rev 2.0
0.004
0.125
Min
270
270
Electrical Characteristics
0.5
0.5
92
32
20
—
2
4
8.0 MHz
Max
16.0
16.0
250
8.0
—
—
—
—
—
—
—
4
Tables of Data
cycles
MHz
MHz
MHz
Unit
t
t
t
ns
ns
ns
ns
cyc
cyc
cyc
s
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