XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 32

• Manufacturer Part Number: XC68HC05P18A
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

Memory Map
2.5 RAM
2.6 ROM
Technical Data
32
$001E
$001F
Addr.
Control Register (ADSCR)
A/D Converter Status and
NOTE:
NOTE:
Register Name
See page 94.
Reserved
Figure 2-3. I/O and Control Registers (Sheet 4 of 4)
The user RAM consists of 192 bytes (including the stack) at locations
$0050–$010F. The stack begins at address $00FF. The stack pointer
can access 64 bytes of RAM from $00FF to $00C0.
Using the stack area for data storage or temporary work locations
requires care to prevent it from being overwritten due to stacking from an
interrupt or subroutine call.
There are 8064 bytes of user ROM available, consisting of:
Address space $3F00–$3FEF is reserved for test code. Unlike other
M68HC05 devices, the MC68HC05P18A does not contain self-check
code.
•
•
•
Reset:
Read:
Write:
8000 bytes at locations $1FC0–$3EFF
48 bytes in page zero locations $0020–$004F
16 additional bytes for user vectors at locations $3FF0–$3FFF
Bit 7
CC
R
0
= Unimplemented
Memory Map
R
R
6
0
ADON
R
5
0
R
R
4
0
0
= Reserved
R
3
0
0
CH2
R
2
0
MC68HC05P18A
U = Unaffected
CH1
R
1
0
MOTOROLA
Bit 0
CH0
R
0