OLIMEX OLinuXino-MAXI User Manual page 25

OLIMEX© 2012
enabled and is mapped to a collection of module pins that must be enabled by programming their
MUXSEL bits in the pin control block. 1 = Serial JTAG is enabled and uses the dedicated DEBUG
pin. The ROM bootcode writes this field prior to enabling JTAG, selecting which type of JTAG pin
signaling to use. OLD_JTAG = 0x0 Use six-wire parallel JTAG mode. SERIAL_JTAG = 0x1 Use
one-wire serial JTAG mode.
It is good idea to check the datasheet of the iMX233 processor for all the options in the digital
control block. The processor's datasheet should be always the first piece of paper you consult when
dealing with electronics.
Classic JTAG (multiplexed with SD card)
Pin # Signal Name
1 SSP1_DATA1
2 SSP1_DATA0
3 GND
4 SSP1_SCK
5 SD_VCC
6 SSP1_CMD
7 SSP1_DATA3
8 SSP1_DATA2
Notice that the pad numeration is written at the bottom of OLinuXino-MAXI under the microSD
card connector. Please check the manual part for microSD card for a schematic of the pins.
Processor Pin #
85
84
30, 35, 98, 105, 112, 118
90
-
83
87
86
Page 25 of 48
OLinuXino User's Manual