ZMID5201/02/03 Datasheet

© 2020 Renesas Electronics Corporation

21

July 21, 2020

Table 11. SENT Tick Length

Decimal

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Hexadecimal

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Number of Ticks

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

0

13

28

15

1

6

2

16 17

3

22

11

7

23

25

4

21

29

8

26 27

12

18

5

9

19

14

10

24

20

Vout

t (ticks)

5

5

22

Figure 17. SENT Frame

The SENT protocol frame consists of a fixed-length synch pulse (LOW period of 5 ticks followed by a HIGH period of 51 ticks), followed by a

status nibble, 6 data nibbles, and a CRC nibble. An optional pause pulse can be programmed to adjust the SENT frame to a fixed length of 270

ticks.

5

Vout

ticks

51

5

5

5

5

5

5

5

5

var

Sync

Status

4-bit (#0)

Data1

MSN

4-bit (#1)

Data1

MidN

4-bit (#2)

Data1

LSN

4-bit (#3)

Data2

MSN, ctr

4-bit (#4)

Data2

LSN, ctr

4-bit (#5)

Data2

inv MSN

4-bit (#6)

CRC

4-bit (#7)

Pause

(optional)

270

5

Note that the status nibble has a maximum length of only 5 + 10 = 15 ticks since bits 2 and 3 are always zero:

Status nibble:

The SENT output frame format can be programmed in one of two options:

1. 12-bit position data + 8-bit rolling counter (“ctr” in Figure 17) + inverted copy of Data1 MSN (nibble #1 in Figure 17) + cyclic redundancy

check (CRC). In this option, the SENT frame length is between 152 and 260 ticks with a variable frame length and 270 ticks with a fixed

frame length.

2. 12-bit position data + “000” data + CRC. In this option, if the pause pulse is disabled, the SENT frame has the shortest possible length:

less than 220 ticks.