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DSH_BT024-00200_1v4 © Ezurio Ltd 2006
6
V
IH
max=3.4V
UART_DCD
21
I or O
O/P : V
OL
max=0.2V
V
OH
min=2.8V
I/P : V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
Direction may be programmed.
UART_RX, UART_TX, UART_CTS, UART_RTS, UART_RI, UART_DCD and UART_DSR are all 3.0v level logic. For
example, when RX and TX are idle they will be sitting at a nominal 3.0V. Conversely for handshaking pins CTS,
RTS, RI, DCD, DSR a 0v is treated as an assertion.
3.3.2.3
General Purpose I/O and ADC
Signal Name
Pin No
I/O
Signal level
Comments
GPIO 4, 5, 6, 7,
8, 9
36, 35,
6, 7, 38,
34
I or O
O/P : V
OL
max=0.2V
V
OH
min=2.8V
I/P : V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
GPIO_4 and 5 are shared with the
onboard LED pads.
GPIO_9
is
also
used
for
PCM_SLVCLK.
GPIO 3
27
I or O
O/P : V
OL
max=0.2V
V
OH
min=2.8V
I/P : V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
Shared with DTR
ADC 0
37
I
Range 0 – 1.8V
ADC
PIO lines can be configured through software to be either inputs or outputs with weak or strong pull-ups or pull-
downs. At reset, all PIO lines are configured as inputs with weak pull-downs.
3.3.2.4
PCM Interface
Signal Name
Pin No
I/O
Signal level
Comments
PCM_CLK
32
I or O
O/P : V
OL
max=0.2V
V
OH
min=2.8V
I/P : V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
If unused keep pins open
PCM_IN
31
I
V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
PCM_SYNC
30
I or O
O/P : V
OL
max=0.2V
V
OH
min=2.8V
I/P : V
IL
max=0.8V
V
IH
min=2.1V
V
IH
max=3.4V
PCM_OUT
33
O
V
OL
max=0.2V
V
OH
min=2.8V
PCM_SLV_CLK
O
O/P : V
OL
max=0.2V
Available as a clock when two
connected devices are both in PCM