MC68HC05L16 Datasheet, PDF (29/146 Pages) Freescale Semiconductor, Inc – Microcontrollers

Addr.
$0031
$0032
$0033
$0034
$0035
↓
$003D
$003E
$003F
Option Map for I/O Configurations
Register Name
LCD Data Register 17 ^Read:
(LCDR17) Write:
See page 101. _Reset:
LCD Data Register 18 Read:
(LCDR18) _Write:
See page 101.
Reset:
LCD Data Register 19 ^Read:
(LCDR19) Write:
See page 101. _Reset:
Bit 7
F33B3
F35B3
F37B3
6
F33B2
F35B2
F37B2
5
F33B1
F35B1
F37B1
4
3
F33B0 F32B3
Unaffected by reset
F35B0 F34B3
Unaffected by reset
F37B0 F36B3
Unaffected by reset
2
F32B2
F34B2
F36B2
1
F32B1
F34B1
F36B1
Bit 0
F32B0
F34B0
F36B0
LCD Data Register 20 ^Read:
0
0
0
0
F38B3 F38B2 F38B1 F38B0
(LCDR20) Write:
See page 101. _Reset:
Unaffected by reset
Reserved
R
R
R
R
R
R
R
R
Reserved
R
R
R
R
R
R
R
R
Miscellaneous Register ^{Read: FTUP STUP}
0
(MISC) Write:
See page 67. _{Reset: *}
*
0
0
SYS1 SYS0
0
1
0
Reserved
R
R
R
R
R
R
* Unaffected by reset but initialized by power-on reset
= Unimplemented
R = Reserved
Figure 2-3. Main I/O Map (Sheet 5 of 5)
FOSCE OPTM
1
0
R
R
U = Unaffected
2.4 Option Map for I/O Configurations
Most of the I/O configurations are done in the option map (Figure 2-4). Some options still remain as mask
options for the MC68HC05L16 such as a pullup resistor for the RESET pin and resistors for the
OSC1/OSC2 and XOSC1/XOSC2 pins. These mask options may be read by the MOSR ($000F) in the
option map.
The option map is located at $0000–$000F of the main memory map and it is available when the OPTM
bit in the MISC register ($003E) is set. Main registers at $0000–$000F are not available when OPTM = 1.
I/O port data direction registers are contained in the option map in Figure 2-4.
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
Freescale Semiconductor
29