MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 37
![no-image](/images/no-image-200.jpg)
MC68HC908JK3
Manufacturer Part Number
MC68HC908JK3
Description
MC68HC908JK1
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JK3.pdf
(210 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC908JK3CP
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Part Number:
MC68HC908JK3ECDW
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
MC68HC908JK3ECDWE
Manufacturer:
INTERSIL
Quantity:
2 900
Part Number:
MC68HC908JK3ECP
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
MC68HC908JK3ECPE
Manufacturer:
ITE
Quantity:
10 000
Part Number:
MC68HC908JK3ECPE
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
MC68HC908JK3EMDWE
Manufacturer:
Freescale
Quantity:
218
Part Number:
MC68HC908JK3EMDWE
Manufacturer:
FREESCALE
Quantity:
20 000
3.1 Contents
3.2 Introduction
3.3 Functional Description
MC68H(R)C908JL3
MOTOROLA
Technical Data — MC68H(R)C908JL3
NOTE:
NOTE:
—
Rev. 1.0
Section 3. Random-Access Memory (RAM)
3.2
3.3
This section describes the 128 bytes of RAM.
Addresses $0080 through $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.
For correct operation, the stack pointer must point only to RAM
locations.
Within page zero are 128 bytes of RAM. Because the location of the
stack RAM is programmable, all page zero RAM locations can be used
for I/O control and user data or code. When the stack pointer is moved
from its reset location at $00FF, direct addressing mode instructions can
access efficiently all page zero RAM locations. Page zero RAM,
therefore, provides ideal locations for frequently accessed global
variables.
Before processing an interrupt, the CPU uses five bytes of the stack to
save the contents of the CPU registers.
For M6805 compatibility, the H register is not stacked.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Random-Access Memory (RAM)
Technical Data
37