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AMD Geode SC3200 User Manual

Page 224

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224

AMD Geode™ SC3200 Processor Data Book

Core Logic Module - Bridge, GPIO, and LPC Registers - Function 0

32581C

5:0

Signal Select. Selects the GPIO signal to be configured in the Bank selected via bit 5 setting (i.e., Bank 0 or Bank 1). See
Table 4-2 on page 70 for GPIO ball muxing options. GPIOs without an associated ball number are not available externally.

Bank 0
000000 = GPIO0 (ball D11)

010000 = GPIO16 (ball V31)

000001 = GPIO1 (balls D10, N30)

010001 = GPIO17 (ball A10)

000010 = GPIO2

010010 = GPIO18 (ball AG1)

000011 = GPIO3

010011 = GPIO19 (ball C9)

000100 = GPIO4

010100 = GPIO20 (balls A9, N31)

000101 = GPIO5

010101 = GPIO21

000110 = GPIO6 (ball D28)

010110 = GPIO22

000111 = GPIO7 (ball C30)

010111 = GPIO23

001000 = GPIO8 (ball C31)

011000 = GPIO24

001001 = GPIO9 (ball C28)

011001 = GPIO25

001010 = GPIO10 (ball B29)

011010 = GPIO26

001011 = GPIO11 (ball AJ8)

011011 = GPIO27

001100 = GPIO12 (ball N29)

011100 = GPIO28

001101 = GPIO13 (ball M29)

011101 = GPIO29

001110 = GPIO14 (ball D9)

011110 = GPIO30

001111 = GPIO15 (ball A8)

011111 = GPIO31

Bank 1
100000 = GPIO32 (ball M28)

110000 = GPIO48

100001 = GPIO33 (ball L31)

110001 = GPIO49

100010 = GPIO34 (ball L30)

110010 = GPIO50

100011 = GPIO35 (ball L29)

110011 = GPIO51

100100 = GPIO36 (ball L28)

110100 = GPIO52

100101 = GPIO37 (ball K31)

110101 = GPIO53

100110 = GPIO38 (ball K28)

110110 = GPIO54

100111 = GPIO39 (ball J31)

110111 = GPIO55

101000 = GPIO40 (ball Y3)

111000 = GPIO56

101001 = GPIO41 (ball W4)

111001 = GPIO57

101010 = GPIO42

111010 = GPIO58

101011 = GPIO43

111011 = GPIO59

101100 = GPIO44

111100 = GPIO60

101101 = GPIO45

111101 = GPIO61

101110 = GPIO46

111110 = GPIO62

101111 = GPIO47

111111 = GPIO63 (Note)

Note:

GPIO63 can be used to generate the PWRBTN# input signal. See PWRBTN# signal description in Section 3.4.15
"Power Management Interface Signals" on page 64.

Offset 24h-27h

GPIO Signal Configuration Access Register (R/W)

Reset Value: 00000044h

This register is used to indicate configuration for the GPIO signal that is selected in the GPIO Signal Configuration Select Register
(above).

Note:

PME debouncing, polarity, and edge/level configuration is only applicable on GPIO0-GPIO15 signals (Bank 0 = 00000 to
01111) and on GPIO32-GPIO47 signals (Bank 1 settings of 00000 to 01111). The remaining GPIOs (GPIO16-GPIO31 and
GPIO48-GPIO63) can not generate PMEs, therefore these bits have no function and read 0.

31:7

Reserved. Must be set to 0.

6

PME Debounce Enable. Enables/disables IRQ debounce (debounce period = 16 ms).

0: Disable.

1: Enable. (Default).

See the note in the description of this register for more information about the default value of this bit.

5

PME Polarity. Selects the polarity of the signal that issues a PME from the selected GPIO signal (falling/low or rising/high).

0: Falling edge or low level input. (Default)

1: Rising edge or high level input.

See the note in the description of this register for more information about the default value of this bit.

Table 6-30. F0BAR0+I/O Offset: GPIO Configuration Registers (Continued)

Bit

Description