參數(shù)資料
型號: MC68HC05CJ4FB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 30/114頁
文件大?。?/td> 4047K
代理商: MC68HC05CJ4FB
GENERAL RELEASE SPECIFICATION
CPU CORE
MC68HC(7)05CJ4
3-2
Rev. 2.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
3.4 Program Counter (PC)
The program counter is a 16-bit register that contains the address of the next byte
to be fetched.
3.4.1 Stack Pointer (SP)
The stack pointer contains the address of the next free location on the stack.
During an MCU reset or the reset stack pointer (RSP) instruction, the stack pointer
is set to location $00FF. The stack pointer is then decremented as data is pushed
onto the stack and incremented as data is pulled from the stack.
When accessing memory, the 10 most significant bits are permanently set to
0000000011. These 10 bits are appended to the six least significant bits to produce
an address within the range of $00FF to $00C0. Subroutines and interrupts may
use up to 64 (decimal) locations. If 64 locations are exceeded, the stack pointer
wraps around and loses the previously stored information. A subroutine call
occupies two locations on the stack; an interrupt uses five locations. See Figure
3-2 for more information.
Figure 3-2. Stacking Order
NOTE
Since the stack pointer decrements during pushes, the program
counter low (PCL) is stacked first, followed by program counter high
(PCH), etc. Pulling from the stack is in the reverse order.
INDEX REGISTER
PCL
ACCUMULATOR
CONDITION CODE REGISTER
PCH
11
1
70
STACK
I
N
T
E
R
U
P
T
DECREASING
UNSTACK
R
E
T
U
R
N
INCREASING
MEMORY
ADDRESSES
MEMORY
ADDRESSES
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料
PDF描述
MC68HC705CJ4FB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
MC68HC05E0FN 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQCC68
MC68HC05E5P 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05E5DW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05J1ACP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05CT4FB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05CT4FN 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05D9 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-bit microcomputer with PWM outputs and LED drive
MC68HC05E0 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
MC68HC05E0FN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller