CS5535 datasheet(462/555 Pages) NSC

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GPIO Subsystem Register Descriptions (Continued)

5.16.4 GPIO Interrupt and PME Registers

There are four 32-bit registers in the mapper used for GPIO INT (Interrupt) and PME (Power Management Event) mapping.

These registers connect any GPIO to one of eight PIC interrupts or to one of eight PME inputs.

GPIO_MAP_W: Maps 8 final inputs ([31:24] of 32 final inputs).

GPIO_MAP_Z: Maps 8 final inputs ([23:16] of 32 final inputs).

GPIO_MAP_Y: Maps 8 final inputs ([15:8] of 32 final inputs).

GPIO_MAP_X: Maps 8 final inputs ([7:0] of 32 final inputs).

The MAP registers setup the routing of the final inputs to either GPIO_INT[7:0] or GPIO_PME[7:0]. The four registers con-

tain 32 4-bit fields, that is a nibble for each final input. Each nibble contains the following control bits:

• PME_SEL: Located in MSB of the nibble and directs the final input to INT when low. If high, the final input is directed to

PME outputs.

• MAP_SEL: These bits determine which bit in the output field the final input is directed to (i.e., either (GPIO_INT[7:0]) or

GPIO_PME[7:0]).

5.16.4.1

GPIO Mapper W (GPIO_MAP_W)

GPIO I/O Offset

ECh

Type

R/W

Reset Value

00000000h

GPIO_MAP_W Register Map

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

9876543210

RSVD

MAP_

SEL_28

MAP_

SEL_27

MAP_

SEL_26

MAP_

SEL_25

MAP_

SEL_24

GPIO_MAP_W Bit Descriptions

Bit

Name

Description

31:20

RSVD

Reserved. Write as 0.

PME_SEL_28

GPIO28 PME Select. Selects where to map GPIO28.

0: INT (Interrupt).

1: PME (Power Management Event).

18:16

MAP_SEL_28

GPIO28 Map Select. Selects which bit of in the output field (i.e., INT or PME) GPIO28

should be mapped to.

000: Bit 0

010: Bit 2

100: Bit 4

110: Bit 6

001: Bit 1

011: Bit 3

101: Bit 5

111: Bit 7

PME_SEL_27

GPIO27 PME Select. Selects where to map GPIO27. See bit 19 for decode.

14:12

MAP_SEL_27

GPIO27 Map Select. Selects which bit of in the output field (i.e., INT or PME) GPIO27

should be mapped to. See bits [18:16] for decode.

PME_SEL_26

GPIO26 PME Select. Selects where to map GPIO26. See bit 19 for decode.

10:8

MAP_SEL_26

GPIO18 Map Select. Selects which bit of in the output field (i.e., INT or PME) GPIO26

should be mapped to. See bits [18:16] for decode.

PME_SEL_25

GPIO25 PME Select. Selects where to map GPIO25. See bit 19 for decode.

6:4

MAP_SEL_25

GPIO25 Map Select. Selects which bit of in the output field (i.e., INT or PME) GPIO25

should be mapped to. See bits [18:16] for decode.

PME_SEL_24

GPIO24 PME Select. Selects where to map GPIO16. See bit 19 for decode.

2:0

MAP_SEL_24

GPIO24 Map Select. Selects which bit of in the output field (i.e., INT or PME) GPIO16

should be mapped to. See bits [18:16] for decode.

CS5535 Datasheet(PDF) 462 Page - National Semiconductor (TI)

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