MC68HC908JK8CP Freescale Semiconductor, MC68HC908JK8CP Datasheet - Page 188

• Manufacturer Part Number: MC68HC908JK8CP
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908JK8CP

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI
• Program Memory Type: Flash
• Program Memory Size: 8KB
• Total Internal Ram Size: 256Byte
• # I/os (max): 15
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 13-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 20
• Package Type: PDIP
• Lead Free Status / Rohs Status: Not Compliant

Electrical Specifications
17.6 5V Control Timing
17.7 5V Oscillator Characteristics
188
Internal operating frequency
RST input pulse width low
TIM2 external clock input
IRQ interrupt pulse width low (edge-triggered)
IRQ interrupt pulse period
Internal oscillator clock frequency
External reference clock to OSC1
Crystal reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor
External RC clock frequency
RC oscillator external R
RC oscillator external C
1. V
2. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
3. Values are based on characterization results, not tested in production.
4. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t
1. Typical value reflect average measurements at midpoint of voltage range, 25 °C only. See
2. No more than 10% duty cycle deviation from 50%.
3. Fundamental mode crystals only.
4. Consult crystal vendor data sheet.
5. Not required for high frequency crystals.
noted.
DD
= 4.5 to 5.5 Vdc, V
(3), (5)
Characteristic
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
RST
IRQ
(4)
(3)
(2)
(3)
Characteristic
(3)
SS
(3)
= 0 Vdc, T
(2)
Table 17-6. Oscillator Specifications (5V)
A
Figure 17-1. RST and IRQ Timing
(1)
= T
Table 17-5. Control Timing (5V)
(3)
L
to T
t
H
t
ILIH
RL
; timing shown with respect to 20% V
f
Symbol
XTALCLK
f
RCCLK
R
C
f
f
ICLK
OSC
R
R
C
C
C
EXT
EXT
B
S
t
L
1
2
ILIL
Symbol
Min
2M
dc
—
—
—
—
—
—
f
T2CLK
t
t
f
t
ILIH
ILIL
OP
RL
See
10 MΩ
Figure 17-2
2 × C
2 × C
50k
Note
Typ
—
—
—
—
—
10
Min
DD
750
100
—
—
(1)
L
L
(4)
and 70% V
Figure 17-5
Freescale Semiconductor
Max
32M
32M
12M
CYC
—
—
—
—
—
—
Max
SS
—
—
—
8
4
, unless otherwise
.
for plot.
Unit
MHz
MHz
Unit
t
Hz
Hz
Hz
Hz
pF
CYC
Ω
ns
ns