TS-7400/TS-9441 MANUAL
CONNECTORS AND HEADERS
Upper header Pin-Out
Pin #
Name
Function
1
TDO
TS-production reserved
2
TMS
TS-production reserved
3
GND
Ground
4
TDI
TS-production reserved
5
BLAST_BOOT#
input, low will hijack CPU SPI bootstrap
6
TCK
TS-production reserved
7
UART0_TXD
ep9302 UART #0 output (/dev/ttyAM0 in Linux)
8
UART0_RXD
ep9302 UART #0 input (/dev/ttyAM0 in Linux)
9
SPI_MISO
SPI master-in, slave-out input
10
3.3V
3.3V TS-7400 regulator output (or input, if U6 regulator is
not populated)
11
BLAST_EE_CS#
chip-select for SPI boot hijack EEPROM
12
SPI_MOSI
SPI master-out, slave in output
13
FLASH_CS#
chip-select used for 2 megabyte SPI flash on TS-9441
(used by TS-SPIBOOT boot program)
14
SPI_CLK
SPI clock output
15
5V
5V regulated power input/output
16
EXT_RESET#
External reset input, low triggers board reset
17
BLAST_PRESENT# Boot hijacker present input
18
GND
Ground
19
PORTB_4
CPU connected GPIO pin, 5V tolerant with external
series resistor.
20
GND
Ground
21
EN_5V
Switching power supply enable input, open-drain, pull
low to disable 5V switcher
22
EP93xx CPU USB port data signal
23
FIL_VIN
Reserved
24
EP_USB-
EP93xx CPU USB port data signal
25
PORTB_7
CPU connected GPIO pin, 6.49k pull-down and 1k series
resistors. 5V tolerant.
26
USB_5V
USB 5V power
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