46.3.1.28.2 Function
Clock stretching (enabled or disabled) affects when the transmit data is transferred. The
TXDSTALL bit will enable clock stretching during the 1st data bit of a slave-transmit
transfer.
• If clock stretching is enabled (TXDSTALL=1), then the transmit data transfer is
stalled until the Slave Transmit register (STDR) is updated. Clock stretching is
extended by at least 1 bus clock cycle after the Slave Transmit Data Register (STDR)
is updated, and clock stretching can be delayed even more using the Clock Hold
Time field (SCFGR2[CLKHOLD], Slave Configuration Register 2).
• If clock stretching is disabled (TXDSTALL=0), then the transmit data should be
written before the start of the slave-transmit transfer; otherwise (i.e., if the transmit
data is not written before the start of the slave-transmit transfer), the FIFO Error Flag
(SSR[FEF]) will be set.
46.3.1.28.3 Diagram
Bits
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
46.3.1.28.4 Fields
Field
Function
31-8
—
Reserved
7-0
DATA
Transmit Data
Writing to the Slave Transmit Data Register (STDR) will store I2C slave transmit data
in
the Slave
Transmit Data Register
46.3.1.29 Slave Receive Data Register (SRDR)
Chapter 46 Low Power Inter-Integrated Circuit (LPI2C)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
1453
Содержание MWCT101 S Series
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