Maxim Integrated MAX32665 - Table 20-8: OWM Data Register; Table 20-9: OWM Interrupt Flag Register

MAX32665-MAX32668 User Guide
Maxim Integrated Page 400 of 457
OWM Control/Status Register
OWM_CTRL_STAT
[0x0008]
Bits
Field
Access
Reset
Description
2
bit_bang_oe
R/W
0
OWM Bit-Bang Output
When bit-bang mode is enabled (OWM_CFG.bit_bang_en = 1), this bit sets the
state of the OWM_IO pin. Setting this bit to 1 drives the OWM_IO pin low.
Setting this bit to 0 releases the line, allowing the OWM_IO pin to be pulled high
by the pullup resistor or held low by a slave device.
0: OWM_IO pin floating.
1: Drive OWM_IO pin to low state.
1
sra_mode
R/W
0
Search ROM Accelerator Enable
Enable Search ROM Accelerator mode. This mode is used to identify slaves and
their addresses that are attached to the 1-Wire bus.
0: Search ROM accelerator mode disabled.
1: Search ROM accelerator mode enabled.
0
start_ow_reset
R/W
0
Start 1-Wire Reset Pulse
Write 1 to start a 1-Wire reset sequence. Automatically cleared by the OWM
hardware when the reset sequence is complete.
0: 1-Wire reset sequence complete or inactive.
1: Start a 1-Wire reset sequence.
Table 20-8: OWM Data Register
OWM Data Register
OWM_DATA
[0x000C]
Bits
Field
Access
Reset
Description
31:8
-
R/W
0
Reserved for Future Use
Do not modify this field.
7:0
tx_rx
R/W
0
OWM Data Field
Writing to this field sets the transmit data and initiates a 1-Wire data transmit
cycle. Reading from this field returns the data received by the master during the
last 1-Wire data transmit cycle.
Table 20-9: OWM Interrupt Flag Register
OWM Interrupt Flag Register
OWM_INTFL
[0x0010]
Bits
Field
Access
Reset
Description
31:5
-
R/W
0
Reserved for Future Use
Do not modify this field.
4
line_low
R/W1C
0
Line Low Flag
If this flag is set, the OWM_IO pin was in a low state. Write 1 to clear this flag.
3
line_short
R/W1C
0
Line Short Flag
The OWM hardware detected a short on the OWM_IO pin. Write 1 to clear this
flag.
2
rx_data_ready
R/W1C
0
RX Data Ready
Data received from the 1-Wire bus and is available in the OWM_DATA.tx_rx
field. Write 1 to clear this flag.
0: RX data not available.
1: Data received and is available in the OWM_DATA.tx_rx field.