Eurotech Bitsy G5, Руководство пользователя

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Bitsy G5 User Manual
14 110121-4001A
3.3.4 J7 (J2): I
2
C and SD/MMC
Board Connector: 2x8 shrouded header, 2 mm, Samtec STMM-108-02-G-D-SM
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-108-02-F-D-450)
6
This header supplies the signals for the I
2
C bus and SD/MMC interface.
Pin Name Type Description
1 I2C_SDA IO
I
2
C bus
2 I2C_SCL IO
3
GND
P
ground
4 P
5 SD_DAT2 IO
SD/MMC signals
7
6 SD_DAT3 IO
7 SD_CMD IO
8 SD_DAT0 IO
9 SD_CLK O
10 /SD_CD I
11 VDDX PO 3.3 V
12 VCC PO 5 V
13 /SD_WP I
SD/MMC signals
14 /SDIO_IRQ I
15 /SD_PWREN O
16 SD_DAT1 IO
3.3.5 J9 (J4): Expansion Bus
Board Connector: 2x25 shrouded header, 2 mm, Samtec STMM-125-02-G-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-125-02-F-D-500)
These signals function as a 3.3 V digital expansion bus to expand the capabilities of the Bitsy G5.
Pin Name Pin Type Description
1 GND P ground
n/c 2
n/c 4
3 PCBD10 IO
Data8-10 5 PCBD9 IO
7 PCBD8 IO
PCBD2 6 IO
Data0-2 PCBD1 8 IO
PCBD0 10 IO
9 n/c
11 n/c
n/c 12
13 PCBA11 O Address 11
15 VCC PO 5 V
6
Note that the STMM header is 0.050-inch higher than the other 2 mm headers on the board
because it is a surface-mount part. Use a correspondingly shorter socket on mating boards.
7
Signal /SD_CD includes a 4.7k Ω pull-up resistor.