TM4C1231C3PM Datasheet, PDF (994/1145 Pages) Texas Instruments – Tiva™ TM4C1231C3PM Microcontroller

Inter-Integrated Circuit (I²C) Interface
Register 10: I²C Master Clock Low Timeout Count (I2CMCLKOCNT), offset
0x024
This register contains the upper 8 bits of a 12-bit counter that can be used to keep the timeout limit
for clock stretching by a remote slave. The lower four bits of the counter are not user visible and
are always 0x0.
Note:
The Master Clock Low Timeout counter counts for the entire time SCL is held Low
continuously. If SCL is deasserted at any point, the Master Clock Low Timeout Counter is
reloaded with the value in the I2CMCLKOCNT register and begins counting down from this
value.
I2C Master Clock Low Timeout Count (I2CMCLKOCNT)
I2C 0 base: 0x4002.0000
I2C 1 base: 0x4002.1000
I2C 2 base: 0x4002.2000
I2C 3 base: 0x4002.3000
Offset 0x024
Type RW, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
CNTL
Type RO
RO
RO
RO
RO
RO
RO
RO
RW
RW
RW
RW
RW
RW
RW
RW
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:8
7:0
Name
reserved
CNTL
Type
RO
RW
Reset Description
0x0000.00 Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0
I²C Master Count
This field contains the upper 8 bits of a 12-bit counter for the clock low
timeout count.
Note: The value of CNTL must be greater than 0x1.
994
June 12, 2014
Texas Instruments-Production Data