User's Manual

FLC-BTM403 Datasheet
Flaircomm Microelectronics Confidential
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8
USB_DP
Bi-directional
USB data plus with selectable internal 1.5Kohm
pull-up resistor
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