mrf24j40 Microchip Technology Inc., mrf24j40 Datasheet - Page 41

• Manufacturer Part Number: mrf24j40
• Description: Ieee 802.15.4? 2.4 Ghz Rf Transceiver
• Manufacturer: Microchip Technology Inc.

9.0
9.1
The MRF24J40 has 6 available, general purpose I/O
pins. These pins are interfaced through the GPIO and
TRISGPIO registers.
REGISTER 9-1:
EXAMPLE 9-1:
© 2006 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SetShortAddress(TRISGPIO,0x03);
SetShortAddress(GPIO,0x01);
U-0
—
GENERAL PURPOSE I/O
GPIO Registers
Unimplemented: Read as ‘0’
GPIO5: General Purpose I/O GPIO5 bit
GPIO4: General Purpose I/O GPIO4 bit
GPIO3: General Purpose I/O GPIO3 bit
GPIO2: General Purpose I/O GPIO2 bit
GPIO1: General Purpose I/O GPIO1 bit
GPIO0: General Purpose I/O GPIO0 bit
U-0
—
GPIO: GPIO PORT REGISTER
READ/WRITE EXAMPLE
W = Writable bit
‘1’ = Bit is set
GPIO5
R/W-0
//set GPIO5-2 to output, and GPIO 1-0 as input
//set GPIO0 high and GPIO1 as low.
Advance Information
GPIO4
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
GPIO3
R/W-0
GPIO2
R/W-0
x = Bit is unknown
MRF24J40
GPIO1
R/W-0
DS39776A-page 39
GPIO0
R/W-0
bit 0