mc68hc05l25 Freescale Semiconductor, Inc, mc68hc05l25 Datasheet - Page 74

• Manufacturer Part Number: mc68hc05l25
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Input/Output Ports (I/O)
7.5.8 Open Drain Output Control Register
BWOMH — Port B Open-Drain Mode (H)
BWOML — Port B Open-Drain Mode (L)
Bits 5–3 — Reserved
CWOM — Port C Open-Drain Mode
AWOM — Port A Open-Drain Mode (High Nibble)
Bit 0 — Reserved
74
When this bit is set, the upper four bits (7–4) of port B pins that are configured as outputs become
open-drain outputs. This bit is cleared on reset.
When this bit is set, the lower four bits (3–0) of port B pins that are configured as outputs become
open-drain outputs. This bit is cleared on reset.
These bits are not used and always read zero.
When this bit is set, port C pins that are configured as outputs become open-drain outputs. This bit is
cleared on reset.
When this bit is set, the upper four bits of port A that are configured as outputs become open-drain
outputs. This bit is cleared on reset.
This bit is not used and always returns to zero.
Address:
Reset:
Read:
Write:
BWOMH
Bit 7
Option — $000A
0
Figure 7-21. Wired-OR Mode Register (WOM)
= Unimplemented
BWOML
6
0
MC68HC05L25 Data Sheet, Rev. 3.1
5
0
0
4
0
0
3
0
0
CWOM
2
0
AWOM
1
0
Freescale Semiconductor
Bit 0
0
0