User's Manual

FLC-BTM403 Series User Manual
Flaircomm Technologies Confidential
-9-
9 USB_DN Bi-directional USB data minus
10 UART_CTS
CMOS output, tri-state, with
weak internal pull-down
UART clear to send active low
11 PCM_IN CMOS Input Synchronous Data Input
12 PCM_CLK Bi-directional Synchronous Data Clock
13 PCM_SYNC Bi-directional Synchronous Data Sync
14 GND Ground Ground
15 GND Ground Ground
16 VDD 3.3V power input 3.3V power input
17 RESET
CMOS input with weak internal
pull-down
Reset if high. Input debounced so must be high
for >5ms to cause a reset
18 PIO6
Bi-directional with
programmable strength internal
pull-up/down
Programmable input/output line
19 PIO7
Bi-directional with
programmable strength internal
pull-up/down
Programmable input/output line
20 PIO4
Bi-directional with
programmable strength internal
pull-up/down
Programmable input/output line
21 SPI_CSB
CMOS input with weak internal
pull-up
Chip select for Synchronous Serial Interface
active low
22 SPI_CLK
input with weak internal pull-
down
Serial Peripheral Interface clock
23 SPI_MISO
CMOS output, tri-state, with
weak internal pull-down
Serial Peripheral Interface output
24 SPI_MOSI
CMOS input, with weak
internal pull-down
Serial Peripheral Interface input
25 PIO5
Bi-directional with
programmable strength internal
pull-up/down
Programmable input/output line
26 UART_TX
CMOS input with weak internal
pull-down
UART data output
27 AIO0 Bi-directional Programmable input/output line
28 GND Ground Ground
Table 3: Pin Definition