CS5535 datasheet(436/555 Pages) NSC

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436

Revision 0.8

GPIO Subsystem Register Descriptions (Continued)

5.16.1 Atomic Bit Programming Model

The registers in Section 5.16.2 "GPIO Low/High Bank Feature Bit Registers", starting on page 438, that are referred to as

“atomic” all follow the same programming model (i.e., work exactly the same way) but each controls a different GPIO fea-

ture. Two data bits are used to control each GPIO Feature bit, each pair of bits operate in an exclusive-OR pattern. Refer to

Section 4.15.2 "Register Strategy" on page 148 for further details.

The Low Bank registers control programming of GPIO15 through GPIO0 and the High Bank registers program GPIO31

through GPIO16. The tables that follow provide the register/bit formats for the Low and High Bank GPIO feature configura-

tion registers.

Note:

All register bits dealing with GPIO31, GPIO30, GPIO29 and GPIO23 are Reserved .

Table 5-60. Low Bank Atomic Register Map

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

7654321

Table 5-61. Low Bank Atomic Bit Descriptions

Bit

Name

Description

31,15

GPIO15

GPIO15 Feature.

00: No change.

01: Feature bit = 1.

10: Feature bit = 0.

11: No change.

30,14

GPIO14

GPIO14 Feature. See bits [31,15] for decode.

29,13

GPIO13

GPIO13 Feature. See bits [31,15] for decode.

28,12

GPIO12

GPIO12 Feature. See bits [31,15] for decode.

27,11

GPIO11

GPIO11 Feature. See bits [31,15] for decode.

26,10

GPIO10

GPIO10 Feature. See bits [31,15] for decode.

25,9

GPIO9

GPIO9 Feature. See bits [31,15] for decode.

24,8

GPIO8

GPIO8 Feature. See bits [31,15] for decode.

23,7

GPIO7

GPIO7 Feature. See bits [31,15] for decode.

22,6

GPIO6

GPIO6 Feature. See bits [31,15] for decode.

21,5

GPIO5

GPIO5 Feature. See bits [31,15] for decode.

20,4

GPIO4

GPIO4 Feature. See bits [31,15] for decode.

19,3

GPIO3

GPIO3 Feature. See bits [31,15] for decode.

18,2

GPIO2

GPIO2 Feature. See bits [31,15] for decode.

17,1

GPIO1

GPIO1 Feature. See bits [31,15] for decode.

16,0

GPIO0

GPIO0 Feature. See bits [31,15] for decode.

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