LZT 123 1836
65
5.16
General Purpose IO
All general purpose IO (GPIO) is programmable by the user. Some GPIO signals are
dedicated, other GPIO can be configured as an alternative to other signal
functionality if it is not required by the user. GPIO which has alternate functionality
is effectively multiplexed, so that the user chooses through AT commands the
appropriate configuration for their application.
Dedicated IO
Pin
Name
Default
Alternate Function
40 GPIO1 GPIO1
None
41 GPIO2 GPIO2
None
43 GPIO3 GPIO3
None
44 GPIO4 GPIO4
None
45 GPIO5 GPIO5
None
48 GPIO6 GPIO6
None
49 GPIO7 GPIO7
None
50 GPIO8 GPIO8
None
51 GPIO9 GPIO9
None
Configurable IO
Pin
Name
Default
Alternate function
74
GPIO10
MMCCLK
SD/MMC card clock
75
GPIO11
MMCCMD
SD/MMC card command
76
GPIO12
MMCDAT0
SD/MMC card data
77
GPIO13
MMCDAT1
SD/MMC card data
78
GPIO14
MMCDAT2
SD/MMC card data
79
GPIO15
MMCDAT3
SD/MMC card data
80
GPIO16
MMCMD_EN
SD/MMC card command enable
81
GPIO17
MMCDAT_EN
SD/MMC card data enable (1-3)
82
GPIO18
MMCDAT_EN0 SD/MMC card data enable (0)
83 GPIO19 KEYROW1 Keyboard
row
1
84
GPIO20
KEYROW2
Keyboard row 2
85 GPIO21 KEYROW3 Keyboard
row
3
86 GPIO22 KEYROW4 Keyboard
row
4
87 GPIO23 KEYROW5 Keyboard
row
5
88 GPIO24 KEYCOL1
Keyboard
row
1
89 GPIO25 KEYCOL2
Keyboard
row
2
90 GPIO26 KEYCOL3
Keyboard
row
3
91 GPIO27 KEYCOL4
Keyboard
row
4
Regular (dedicated) IO and alternate function IO have exactly the same characteristics
and can be programmed in the same way. The use of alternate function IO is subject
to some degree of limitation:
Содержание GS64
Страница 1: ...GS64 GSM GPRS Modem Integrators Manual...
Страница 8: ...LZT 123 1836 8 Overview...
Страница 22: ...LZT 123 1836 22 Integrating the Wireless Modem...
Страница 64: ...LZT 123 1836 64 Figure 5 15 1 Typical circuit for LEDs...
Страница 91: ...LZT 123 1836 91 Developers Kit...