MC68HC908QY2CDW Freescale Semiconductor, MC68HC908QY2CDW Datasheet - Page 139

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MC68HC908QY2CDW

Manufacturer Part Number
MC68HC908QY2CDW
Description
IC MCU 1.5K FLASH W/ADC 16-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC68HC908QY2CDW

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
1.5KB (1.5K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Connectivity
-
15.3.1 Functional Description
Figure 15-9
The monitor module receives and executes commands from a host computer.
and
computer via a standard RS-232 interface.
Freescale Semiconductor
PROGRAMMING
FROM
IS ENABLED)
DEBUGGING
CONDITIONS
AND FLASH
(IF FLASH
Figure 15-12
Table 15-1
shows a simplified diagram of monitor mode entry.
show example circuits used to enter monitor mode and communicate with a host
MONITOR MODE
RESET VECTOR
Figure 15-9. Simplified Monitor Mode Entry Flowchart
PTA0 = 1,
FORCED
BLANK?
YES
MC68HC908QY/QT Family Data Sheet, Rev. 6
YES
NO
NO
MONITOR MODE ENTRY
8 SECURITY BYTES
MONITOR CODE
DOES RESET
HOST SENDS
USER MODE
IS RESET
EXECUTE
POR RESET
IRQ = V
OCCUR?
NORMAL
POR?
NO
TST
?
YES
NO
YES
ENABLE FLASH
MONITOR MODE
PTA1 = 1, AND
PTA4 = 0?
PTA0 = 1,
NORMAL
YES
YES
SECURITY BYTES
CORRECT?
Figure
ARE ALL
NO
15-10,
Monitor Module (MON)
USER MODE
INVALID
DISABLE FLASH
NO
Figure
15-11,
139

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