s908qc16vdse Freescale Semiconductor, Inc, s908qc16vdse Datasheet - Page 243

• Manufacturer Part Number: s908qc16vdse
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

19.10 3.3-V Control Timing
19.11 Oscillator Characteristics
Freescale Semiconductor
Internal oscillator frequency
Trim accuracy
Deviation from trimmed Internal oscillator
External RC oscillator frequency, RCCLK
External clock reference frequency
Internal operating frequency
Internal clock period (1/f
RST input pulse width low
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
1. V
2. Values are based on characterization results, not tested in production.
3. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
ICFS1:ICFS0 = 00
ICFS1:ICFS0 = 01
ICFS1:ICFS0 = 10
ICFS1:ICFS0 = 11 (not allowed if V
4, 8, 12.8, 25.6MHz, V
4, 8, 12.8, 25.6MHz, V
V
V
V
V
DD
DD
DD
DD
noted.
DD
≥ 4.5 V
< 4.5 V
≥ 4.5 V
≥ 3.0 V
= 3.0 to 3.6 Vdc, V
(2)(3)
Characteristic
RST
IRQ
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 4
DD
DD
OP
Characteristic
(2)
(2)
SS
)
± 10%, 0 to 70°C
± 10%, –40 to 125°C
(1)
= 0 Vdc, T
(1) (5) (6)
DD
A
< 4.5 V)
Figure 19-6. RST and IRQ Timing
(3)(4)
(1) (3)
(1)
= T
L
(2)
to T
t
H
t
ILIH
RL
; timing shown with respect to 20% V
∆
∆
f
Symbol
TRIM_ACC
OSCXCLK
f
INT_TRIM
f
t
INTCLK
ILIL
RCCLK
f
Symbol
OP
t
t
t
CYC
Min
t
ILIH
ILIL
(f
RL
—
—
—
—
—
—
—
dc
dc
2
2
Bus
)
Note
Min
DD
250
200
200
—
± 0.4
12.8
25.6
Typ
± 2
—
—
—
—
—
4
8
(3)
and 70% V
— Continued on next page
CYC
3.3-V Control Timing
Max
DD
—
—
—
—
4
Max
, unless otherwise
± 5
8.4
.
12
32
16
—
—
—
—
—
—
MHz
Unit
t
CYC
ns
ns
ns
MHz
MHz
MHz
Unit
%
%
243