Product Specs

Table Of Contents
33 TWIM I
2
C compatible two-wire interface
master with EasyDMA
Page
317
T,CL
NT
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
A
0
6
A
0
5
A
0
4
A
0
3
A
0
2
A
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A RW MAXCNT [1..255] Maximum number of bytes in transmit buffer
33.8.16 TXD.AMOUNT
Address offset: 0x54C
Number of bytes transferred in the last transaction
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
A
0
6
A
0
5
A
0
4
A
0
3
A
0
2
A
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A R AMOUNT
Number of bytes transferred in the last transaction. In case of
NACK error, includes the NACK'ed byte.
33.8.17 TXD.LIST
Address offset: 0x550
EasyDMA list type
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
A
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A RW LIST
List type
Disabled
0
Disable EasyDMA list
ArrayList
1
Use array list
33.8.18 ADDRESS
Address offset: 0x588
Address used in the TWI transfer
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
A
0
5
A
0
4
A
0
3
A
0
2
A
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A RW ADDRESS
33.9 Electrical specification
Address used in the TWI transfer
33.9.1 TWIM interface electrical specifications
Symbol Description
Min.
Typ.
Max.
Units
f
TWIM
Bit rates for TWIM
30
100
400
kbps
I
TWIM,100kbps
Run current for TWIM, 100 kbps
50
µA
I
TWIM,400kbps
Run current for TWIM, 400 kbps
50
µA
t
TWIM,START,LP
Time from STARTRX/STARTTX task to transmission started, Low
power mode
t
TWIM,STAR
+
µs
t
START_HFI
t
TWIM,START,CL
Time from STARTRX/STARTTX task to transmission started,
Constant latency mode
1.5
µs
30
Higher bit rates or stronger pull-ups may require GPIOs to be set as High Drive, see GPIO chapter for more
details.