MCL908QY2CDTE Freescale Semiconductor, MCL908QY2CDTE Datasheet - Page 31

• Manufacturer Part Number: MCL908QY2CDTE
• Description: IC MCU 8BIT 1.5K FLASH 16-TSSOP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCL908QY2CDTE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 2MHz
• 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): 2.4 V ~ 3.6 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

2.5 Random-Access Memory (RAM)
The 128 bytes of random-access memory (RAM) are located at addresses $0080–$00FF. 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.
Freescale Semiconductor
Vector Priority
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.
Highest
Lowest
Vector
MC68HLC908QY/QT Family Data Sheet, Rev. 3
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 (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)
ADC conversion complete vector (high)
.
Vector
Random-Access Memory (RAM)
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