MC68HC908QT2CDW

Manufacturer Part NumberMC68HC908QT2CDW
DescriptionIC MCU 1.5K FLASH W/ADC 8-SOIC
ManufacturerFreescale Semiconductor
SeriesHC08
MC68HC908QT2CDW datasheet
 

Specifications of MC68HC908QT2CDW

Core ProcessorHC08Core Size8-Bit
Speed8MHzPeripheralsLVD, POR, PWM
Number Of I /o5Program Memory Size1.5KB (1.5K x 8)
Program Memory TypeFLASHRam Size128 x 8
Voltage - Supply (vcc/vdd)2.7 V ~ 5.5 VOscillator TypeInternal
Operating Temperature-40°C ~ 85°CPackage / Case8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantEeprom Size-
Data Converters-Connectivity-
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Table 15-7. READSP (Read Stack Pointer) Command
Description
Reads stack pointer
Operand
None
Returns incremented stack pointer value (SP + 1) in
Data Returned
high-byte:low-byte order
Opcode
$0C
FROM HOST
ECHO
Table 15-8. RUN (Run User Program) Command
Description
Executes PULH and RTI instructions
Operand
None
Data Returned
None
Opcode
$28
The MCU executes the SWI and PSHH instructions when it enters monitor mode. The RUN command
tells the MCU to execute the PULH and RTI instructions. Before sending the RUN command, the host can
modify the stacked CPU registers to prepare to run the host program. The READSP command returns
the incremented stack pointer value, SP + 1. The high and low bytes of the program counter are at
addresses SP + 5 and SP + 6.
Figure 15-17. Stack Pointer at Monitor Mode Entry
Freescale Semiconductor
Command Sequence
SP
READSP
READSP
HIGH
Command Sequence
FROM HOST
RUN
RUN
ECHO
HIGH BYTE OF INDEX REGISTER
CONDITION CODE REGISTER
ACCUMULATOR
LOW BYTE OF INDEX REGISTER
HIGH BYTE OF PROGRAM COUNTER
LOW BYTE OF PROGRAM COUNTER
MC68HC908QY/QT Family Data Sheet, Rev. 6
Monitor Module (MON)
SP
LOW
RETURN
SP
SP + 1
SP + 2
SP + 3
SP + 4
SP + 5
SP + 6
SP + 7
147

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