MC9S08QD2MSCR Freescale Semiconductor, MC9S08QD2MSCR Datasheet - Page 74
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MC9S08QD2MSCR
Manufacturer Part Number
MC9S08QD2MSCR
Description
IC MCU 8BIT 8-SOIC
Manufacturer
Freescale Semiconductor
Series
HCS08r
Specifications of MC9S08QD2MSCR
Core Processor
HCS08
Core Size
8-Bit
Speed
16MHz
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
4
Program Memory Size
2KB (2K 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 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
8-SOIC (3.9mm Width)
Processor Series
S08QD
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
128 B
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08QD4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
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Chapter 7 Central Processor Unit (S08CPUV2)
7.2
Figure 7-1
7.2.1
The A accumulator is a general-purpose 8-bit register. One operand input to the arithmetic logic unit
(ALU) is connected to the accumulator and the ALU results are often stored into the A accumulator after
arithmetic and logical operations. The accumulator can be loaded from memory using various addressing
modes to specify the address where the loaded data comes from, or the contents of A can be stored to
memory using various addressing modes to specify the address where data from A will be stored.
Reset has no effect on the contents of the A accumulator.
7.2.2
This 16-bit register is actually two separate 8-bit registers (H and X), which often work together as a 16-bit
address pointer where H holds the upper byte of an address and X holds the lower byte of the address. All
indexed addressing mode instructions use the full 16-bit value in H:X as an index reference pointer;
however, for compatibility with the earlier M68HC05 Family, some instructions operate only on the
low-order 8-bit half (X).
Many instructions treat X as a second general-purpose 8-bit register that can be used to hold 8-bit data
values. X can be cleared, incremented, decremented, complemented, negated, shifted, or rotated. Transfer
instructions allow data to be transferred from A or transferred to A where arithmetic and logical operations
can then be performed.
For compatibility with the earlier M68HC05 Family, H is forced to 0x00 during reset. Reset has no effect
on the contents of X.
74
Programmer’s Model and CPU Registers
shows the five CPU registers. CPU registers are not part of the memory map.
Accumulator (A)
Index Register (H:X)
H
CONDITION CODE REGISTER
15
15
INDEX REGISTER (HIGH)
16-BIT INDEX REGISTER H:X
MC9S08QD4 Series MCU Data Sheet, Rev. 6
PROGRAM COUNTER
STACK POINTER
Figure 7-1. CPU Registers
8
V 1 1 H I N Z
7
7
7
INDEX REGISTER (LOW)
ACCUMULATOR
C
0
0
0
0
CARRY
ZERO
NEGATIVE
INTERRUPT MASK
HALF-CARRY (FROM BIT 3)
TWO’S COMPLEMENT OVERFLOW
SP
PC
CCR
A
X
Freescale Semiconductor
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