MC68HC908QY4CP Freescale Semiconductor, MC68HC908QY4CP Datasheet - Page 32

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MC68HC908QY4CP

Manufacturer Part Number
MC68HC908QY4CP
Description
IC MCU 4K FLASH W/ADC 16-DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC68HC908QY4CP

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
4KB (4K 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-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Connectivity
-

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Memory
2.5 Random-Access Memory (RAM)
Addresses $0080–$00FF are RAM locations. The location of the stack RAM is programmable. The 16-bit
stack pointer allows the stack to be anywhere in the 64-Kbyte memory space.
Before processing an interrupt, the central processor unit (CPU) uses five bytes of the stack to save the
contents of the CPU registers.
During a subroutine call, the CPU uses two bytes of the stack to store the return address. The stack
pointer decrements during pushes and increments during pulls.
32
For correct operation, the stack pointer must point only to RAM locations.
For M6805, M146805, and M68HC05 compatibility, the H register is not
stacked.
Be careful when using nested subroutines. The CPU may overwrite data in
the RAM during a subroutine or during the interrupt stacking operation.
Vector Priority
Highest
Lowest
Vector
MC68HC908QY/QT Family Data Sheet, Rev. 6
IF15
IF14
IF13
IF6
IF5
IF4
IF3
IF2
IF1
Table 2-1. Vector Addresses
Address
$FFDE
$FFDF
$FFFB
$FFFC
$FFFD
$FFFE
$FFE0
$FFE1
$FFF2
$FFF3
$FFF4
$FFF5
$FFF6
$FFF7
$FFFA
$FFFF
NOTE
NOTE
NOTE
ADC conversion complete vector (high)
ADC conversion complete vector (low)
Keyboard vector (high)
Keyboard vector (low)
Not used
TIM overflow vector (high)
TIM overflow vector (low)
TIM Channel 1 vector (high)
TIM Channel 1 vector (low)
TIM Channel 0 vector (high)
TIM Channel 0 vector (low)
Not used
IRQ vector (high)
IRQ vector (low)
SWI vector (high)
SWI vector (low)
Reset vector (high)
Reset vector (low)
.
Vector
Freescale Semiconductor

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