MC68HC711xxxx Motorola, MC68HC711xxxx Datasheet - Page 48

• Manufacturer Part Number: MC68HC711xxxx
• Description: Microcontrollers
• Manufacturer: Motorola

Operating Modes and On-Chip Memory
2.3.3.1 System Configuration Register
Data Sheet
48
NOTE:
The system configuration register (CONFIG) consists of an EEPROM byte and
static latches that control the startup configuration of the MCU. The contents of the
EEPROM byte are transferred into static working latches during reset sequences.
The operation of the MCU is controlled directly by these latches and not by
CONFIG itself. In normal modes, changes to CONFIG do not affect operation of the
MCU until after the next reset sequence. When programming, the CONFIG register
itself is accessed. When the CONFIG register is read, the static latches are
accessed. See
information on modifying CONFIG.
To take full advantage of the MCU’s functionality, customers can program the
CONFIG register in bootstrap mode. This can be accomplished by setting the
mode pins to logic 0 and downloading a small program to internal RAM. For more
information, Motorola application note AN1060 entitled
Mode
will consist of:
All of this functionality is provided by PCbug11 which can be found on the Motorola
Web site at http://www.motorola.com/semiconductors/. For more information
on using PCbug11 to program an E-series device, Motorola engineering bulletin
EB296 entitled
M68HC11EVBU
The CONFIG register on the 68HC11 is an EEPROM cell and must be
programmed accordingly.
Operation of the CONFIG register in the MC68HC811E2 differs from other devices
in the M68HC11 E series. See
Resets:
U indicates a previously programmed bit. U(L) indicates that the bit resets to the logic level held in the latch prior to reset,
but the function of COP is controlled by the DISR bit in TEST1 register.
Single chip:
Expanded:
Bootstrap:
•
•
•
Address: $103F
Read:
Write:
Test:
has been included at the back of this document. The downloadable talker
Bulk erase
Byte programming
Communication server
Figure 2-10. System Configuration Register (CONFIG)
Bit 7
Operating Modes and On-Chip Memory
0
0
0
0
Programming MC68HC711E9 Devices with PCbug11 and the
2.5.1 EEPROM and CONFIG Programming and Erasure
has been included at the back of this document.
= Unimplemented
6
0
0
0
0
Figure 2-10
5
0
0
0
0
4
0
0
0
0
and
NOSEC
Figure
U
U
3
1
1
M68HC11 Bootstrap
2-11.
NOCOP
M68HC11E Family — Rev. 5
U(L)
U(L)
U
U
2
ROMON
U
U
U
1
1
MOTOROLA
for
EEON
Bit 0
U
U
U
U