MC68HRC908JK3CP Freescale Semiconductor, MC68HRC908JK3CP Datasheet - Page 106
MC68HRC908JK3CP
Manufacturer Part Number
MC68HRC908JK3CP
Description
IC MCU FLASH 8B 8MHZ RC 4K 20DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908JK1CDW.pdf
(212 pages)
Specifications of MC68HRC908JK3CP
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LED, LVD, POR, PWM
Number Of I /o
15
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.3 V
Data Converters
A/D 12x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Connectivity
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HRC908JK3CP
Manufacturer:
FREECAL
Quantity:
20 000
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Monitor ROM (MON)
9.4.1 Entering Monitor Mode
Technical Data
104
V
V
Notes:
1. PTB3 = 0: Bypasses the divide-by-two prescaler to SIM when using V
2. XTALCLK is the X-tal oscillator output, for MC68HC908xxx. See
4. RCCLK is the RC oscillator output, for MC68HRC908xxx. See
5. See
DD
DD
V
V
The OSC1 clock must be 50% duty cycle for this condition.
DD
DD
+ V
+ V
Table 18-4
HI
HI
(contain
BLANK
BLANK
$FF)
NOT
X
X
for V
Table 9-1. Monitor Mode Entry Requirements and Options
DD
+ V
X
X
0
1
HI
Table 9-1
specified in the table, monitor mode may be entered after a POR and will
allow communication at 9600 baud provided one of the following sets of
conditions is met:
voltage level requirements.
1. If IRQ1 = V
2. If IRQ1 = V
3. If $FFFE & $FFFF is blank (contains $FF):
X
X
0
0
– External clock on OSC1 is 4.9125MHz
– PTB3 = low
– External clock on OSC1 is 9.8304MHz
– PTB3 = high
– The oscillator clock is 9.8304MHz (X-tal or RC)
– IRQ1 = V
X
X
1
1
shows the pin conditions for entering monitor mode. As
X
1
1
1
desired frequency
Monitor ROM (MON)
Clock Source
DD
DD
4.9152MHz
9.8304MHz
9.8304MHz
Frequency
oscillator at
oscillator at
X-tal or RC
X-tal or RC
DD
OSC1 at
OSC1 at
+ V
+ V
and
HI
HI
:
:
Figure
Figure
DD
8-2.
XTALCLK ÷ 4
2.4576MHz
2.4576MHz
2.4576MHz
Frequency
RCCLK ÷ 4
8-1.
+ V
Bus
HI
or
for monitor mode entry.
MC68H(R)C908JL3
Bypasses X-tal or RC
oscillator; external clock
driven directly into OSC1.
9600 baud communication
on PTB0. COP disabled.
Low-voltage entry to
monitor mode.
9600 baud communication
on PTB0. COP disabled.
Enters User mode.
If $FFFE and $FFFF is
blank, MCU will encounter
an illegal address reset.
Freescale Semiconductor
Comments
—
Rev. 1.1
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