mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 395

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC912DG128 — Rev 3.0
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 (PW
1. When using a quartz crystal, operation should be restricted to 8MHz.
t
To guarantee external reset vector
Minimum input time (can be preempted by internal reset)
PW
PCSU
IRQ
PT7
PT7
NOTES:
1. Rising edge sensitive input
2. Falling edge sensitive input
PT[7:0]
PT[7:0]
t
cyc
2t
1
2
cyc
2 20
1
2
20
Characteristic
1. RESET is recognized during the first clock cycle it is held low. Internal circuitry then drives
PW
PW
Freescale Semiconductor, Inc.
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
For More Information On This Product,
TIM
Table 19-12. Control Timing
= 2 t
Figure 19-3. Timer Inputs
Go to: www.freescale.com
cyc
Electrical Specifications
+ 20)
Symbol
PW
PW
PW
t
t
t
t
PCSU
t
MPS
MPH
WRS
f
cyc
f
eo
RSTL
o
IRQ
TIM
0.004
0.125
Min
270
270
0.5
82
32
10
—
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
ns
ns
ns
ns
cyc
cyc
cyc
s
395