MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 32

• Manufacturer Part Number: MCMC68HC05L16
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Memory Map
2.4.3 Open-Drain Output Control Register 1
DWOMH — Port D Open-Drain Mode (H)
DWOML — Port D Open-Drain Mode (L)
EWOMH — Port E Open-Drain Mode (H)
EWOML — Port E Open-Drain Mode (L)
Bits 3 and 2 — Reserved
AWOMH — Port A Open-Drain Mode (H)
AWOML — Port E Open-Drain Mode (L)
2.4.4 Open-Drain Output Control Register 2
Bits 7 and 6 — Reserved
32
When this bit is set, the upper four bits of port D are configured as open-drain outputs if these bits are
selected as port D output by the PDH bit in the LCDCR. This bit is cleared on reset.
When this bit is set, the lower three bits of port D are configured as open-drain outputs if the
corresponding BPx pin is not used by the LCD driver. This bit is cleared on reset.
When this bit is set, the upper four bits of port E (that are configured as I/O output by the PEH bit in
the LCDCR) are configured as open-drain outputs. This bit is cleared on reset.
When this bit is set, the lower four bits of port E (that are configured as I/O output by the PEL bit in the
LCDCR) are configured as open-drain outputs. This bit is cleared on reset.
These bits are not used and always return to logic 0.
When this bit is set, the upper four bits of port A that are configured as output (corresponding to the
DDRA bit set) become open-drain outputs. This bit is cleared on reset.
When this bit is set, the lower four bits of port A that are configured as output (corresponding DDRA
bit set) become open-drain outputs. This bit is cleared on reset.
These bits are not used and always read as logic 1. When configured as output, PC6 and PC7 are
always open drain.
Address:
Address:
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 2-7. Open-Drain Output Control Register 1 (WOM1)
Figure 2-8. Open-Drain Output Control Register 2 (WOM2)
DWOMH
Option Map — $000A
Option Map — $000B
Bit 7
Bit 7
0
1
1
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
DWOML
6
0
6
1
1
EWOMH
CWOM5
5
0
5
0
EWOML
CWOM4
4
0
4
0
CWOM3
3
0
0
3
0
CWOM2
2
0
0
2
0
AWOMH
CWOM1
1
0
1
0
Freescale Semiconductor
AWOML
CWOM0
Bit 0
Bit 0
0
0