MC68HC812A4 Datasheet, PDF (329/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

18.12 Control Timing
Characteristic
Frequency of operation
E-clock period
Crystal frequency
External oscillator frequency
Processor control setup time
t_PCSU = t_cyc/2 + 30
Reset input pulse width
To guarantee external reset vector
Minimum input time (can be pre-empted by internal reset)
Mode programming setup time
Mode programming hold time
Interrupt pulse width, IRQ, edge-sensitive mode, KWU
PW_IRQ = 2 t_cyc + 20
Wait recovery startup time
Timer pulse width, input capture pulse accumulator input
PW_TIM = 2 t_cyc + 20
Electrical Characteristics
Control Timing
Symbol
f_o
t_cyc
f_XTAL
2 f_o
t_PCSU
8.0 MHz
Min
Max
dc
5.0
125
—
—
16.0
dc
16.0
82
—
Unit
MHz
ns
MHz
MHz
ns
PW_RSTL
t_MPS
t_MPH
PW_IRQ
t_WRS
PW_TIM
32
2
4
10
TBD
—
TBD
—
t_cyc
—
—
t_cyc
—
ns
—
ns
4
t_cyc
—
ns
PT[7:0]⁽¹⁾
PT[7:0]⁽²⁾
PW_TIM
PT7⁽¹⁾
PT7⁽²⁾
PW_PA
Notes:
1. Rising edge-sensitive input
2. Falling edge-sensitive input
Figure 18-1. Timer Inputs
Advance Information
MOTOROLA
Electrical Characteristics
MC68HC812A4 — Rev. 3.0
329