MCHC908JK1MPE Freescale Semiconductor, MCHC908JK1MPE Datasheet - Page 80
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MCHC908JK1MPE
Manufacturer Part Number
MCHC908JK1MPE
Description
IC MCU 1.5K FLASH 20-PDIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908JK1CDW.pdf
(212 pages)
Specifications of MCHC908JK1MPE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LED, LVD, POR, PWM
Number Of I /o
14
Program Memory Size
1.5KB (1.5K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
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System Integration Module (SIM)
7.4.2.1 Power-On Reset
Technical Data
78
2OSCOUT
OSCOUT
PORRST
OSC1
RST
IAB
The active reset feature allows the part to issue a reset to peripherals
and other chips within a system built around the MCU.
When power is first applied to the MCU, the power-on reset module
(POR) generates a pulse to indicate that power-on has occurred. The
external reset pin (RST) is held low while the SIM counter counts out
4096 2OSCOUT cycles. Sixty-four 2OSCOUT cycles later, the CPU and
memories are released from reset to allow the reset vector sequence to
occur.
At power-on, the following events occur:
•
•
•
•
•
•
CYCLES
4096
A POR pulse is generated.
The internal reset signal is asserted.
The SIM enables the oscillator to drive 2OSCOUT.
Internal clocks to the CPU and modules are held inactive for 4096
2OSCOUT cycles to allow stabilization of the oscillator.
The RST pin is driven low during the oscillator stabilization time.
The POR bit of the reset status register (RSR) is set and all other
bits in the register are cleared.
Figure 7-7. POR Recovery
System Integration Module (SIM)
CYCLES
32
CYCLES
32
$FFFE
MC68H(R)C908JL3
Freescale Semiconductor
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—
Rev. 1.1
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