MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 51

• Manufacturer Part Number: MC68HC711PH8
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
• Manufacturer: Motorola

PH8.DS03/Modes+mem
3.2.1.2
The MCU has 48K bytes of ROM/ EPROM . The ROM/ EPROM array is enabled when the ROMON
bit in the CONFIG register is set to one (erased). The ROMAD bit in CONFIG places the
ROM/ EPROM at either $4000–$FFFF (ROMAD = 1) or at $0000–$BFFF (ROMAD = 0) when
coming out of reset in expanded mode.
3.2.1.3
The bootloader ROM is enabled at address $BE40–$BFFF during special bootstrap mode. The
reset vector is fetched from this ROM and the MCU executes the bootloader firmware. In normal
modes, the bootloader ROM is disabled.
3.2.2
In Table 3-2, a summary of registers and control bits, the registers are shown in ascending order
within the 128-byte register block. The addresses shown are for default block mapping
($0000–$007F), however, the INIT register remaps the block to any 4K page ($x000–$x07F). See
Section 3.3.2.2.
MC68HC11PH8
1) During the software-based STOP mode, MCU clocks are stopped, but the
2) To reduce power consumption to a minimum, V
MCU continues to draw power from V
related to operating frequency in CMOS integrated circuits and there is very
little leakage when the clocks are stopped. These two factors reduce power
consumption while the MCU is in STOP mode.
MODB/VSTBY pin can be used to supply RAM power from either a battery
back-up or a second power supply. Although this method requires external
hardware, it is very effective. Refer to Section 2 for information about how to
connect the stand-by RAM power supply and to Section 10 for a description
of low power operation.
ROM and EPROM
Bootloader ROM
Registers
OPERATING MODES AND ON-CHIP MEMORY
—this line does not form part of the document—
DD
. Power supply current is directly
DD
can be turned off, and the
[DS97 v 4.1] 08/Apr/97@13:55
MOTOROLA
TPG
3-5
10
12
13
14
15
11
1
2
3
4
5
6
7
8
9