3 rs-232 interface, 4 spi bus, 5 pcm interface – Rainbow Electronics DAB-WLS-C21 (BlueTooth) User Manual
Page 7: 6 general purpose i/o and adc, 7 miscellaneous
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DSH_BTM402_0v9 BISM2 PA Data Sheet.DOC
© 2007 EZURiO Ltd
7
3.3.2.3
RS-232 Interface
Signal Name
Pin No
I/O
Comments
UART_TX 21 O
UART_RX 25 I
UART_CTS 19 I
UART_RTS 23 O
UART_DSR 10 I
UART_DTR
12
O
Shared with GPIO3
UART_RI
6
I or O
Direction may be programmed.
UART_DCD
8
I or O
Direction may be programmed.
3.3.2.4
SPI Bus
Signal Name
Pin No
I/O
Comments
SPI_MOSI 17 I
SPI_MISO 5 O
SPI_CSB 7 I
SPI_CLK 9 I
Used to reprogram Flash
3.3.2.5
PCM Interface
Signal Name
Pin No
I/O
Comments
PCM_CLK
20
I or O
PCM_IN 22
I
PCM_SYNC
24
I or O
PCM_OUT 26 O
If unused keep pins open.
PCM output signals are tri-
stated when there is not an
active SCO or eSCO
connection.
3.3.2.6
General Purpose I/O and ADC
Signal Name
Pin No
I/O
Signal level
Comments
GPIO 3 - 9
12,14,
16, 33,
35,37,
39
I or O
See 3.3.2.2.
AIO_0, AIO_1
1, 3
I
Range 0 – 1.8V
8 bit
3.3.2.7
Miscellaneous
Signal Name
Pin No
I/O
Signal level
Comments
USB D-
32
I
V
IL
max =0.3vdd_usb
V
IH
min =0.7vdd_usb
Normally inactive. Pull to GND
through 10kΩ.
USB D+
34
I
V
IL
max =0.3vdd_usb
V
IH
min =0.7vdd_usb
Normally inactive. Pull to GND
through 10kΩ.