MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 429

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC912DT128A — Rev 4.0
MOTOROLA
Frequency of operation
E-clock period
External oscillator frequency
Processor control setup time
Reset input pulse width
Mode programming setup time
Mode programming hold time
Interrupt pulse width, IRQ edge-sensitive mode
Wait recovery startup time
Timer input capture pulse width
1. When using a resonator (quartz or ceramic), see
t
To guarantee external reset vector
Minimum input time (can be preempted by internal reset)
PW
PCSU
IRQ
= t
= 2t
PT7
PT7
NOTES:
1. Rising edge sensitive input
2. Falling edge sensitive input
PT[7:0]
PT[7:0]
cyc
1
2
cyc
/2+ 30
1
2
NOTE:
+ 20
Characteristic
RESET is recognized during the first clock cycle it is held low. Internal
circuitry then drives the pin low for 16 clock cycles, releases the pin, and
samples the pin level 9 cycles later to determine the source of the
interrupt.
PW
PW
TIM
PA
Table 21-12. Control Timing
Figure 21-1. Timer Inputs
Electrical Specifications
Table 21-17
for allowable values.
PW
Symbol
PW
PW
t
t
t
t
PCSU
WRS
t
MPS
MPH
f
cyc
f
eo
RSTL
o
IRQ
TIM
0.004
0.125
Min
270
270
0.5
92
32
20
—
2
4
Electrical Specifications
8.0 MHz
16.0
Max
250
8.0
—
—
—
—
—
—
—
4
Technical Data
Tables of Data
(1)
cycles
MHz
MHz
Unit
t
t
t
µs
ns
ns
ns
ns
cyc
cyc
cyc
429