MC68HC705C9ACFN Freescale Semiconductor, MC68HC705C9ACFN Datasheet - Page 33

• Manufacturer Part Number: MC68HC705C9ACFN
• Description: IC MCU 2.1MHZ 16K OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C9ACFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: OTP
• Ram Size: 352 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Chapter 3
Central Processor Unit (CPU)
3.1 Introduction
This section contains the basic programmers model and the registers contained in the CPU.
3.2 CPU Registers
The MCU contains five registers as shown in the programming model of
order is shown in
Freescale Semiconductor
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15
0
Figure
0
INCREASING
ADDRESSES
MEMORY
0
3-2.
0
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
UNSTACK
0
0
R
E
U
R
N
T
Figure 3-2. Interrupt Stacking Order
0
Figure 3-1. Programming Model
7
1
0
7
7
7
PC
1
1
1
1
INDEX REGISTER
ACCUMULATOR
CONDITION CODE REGISTER
H
PCH
PCL
A
X
I
SP
CCR
N
Z
C
0
0
0
0
0
PROGRAM COUNTER
ACCUMULATOR
INDEX REGISTER
STACK POINTER
CONDITION CODE REGISTER
N
R
R
U
T
E
P
T
I
Figure
STACK
DECREASING
ADDRESSES
MEMORY
3-1. The interrupt stacking
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